# IAQ Detectors by Ace Instruments

> IAQ Detectors is the indoor air quality monitoring brand of Ace Instruments, a CE certified, ISO 9001:2015 manufacturer based in Hyderabad, India, with over 30 years of instrumentation expertise since 1991. Ace Instruments designs and builds IAQ monitors, gas detectors, and environmental transmitters for commercial buildings, HVAC systems, healthcare facilities, cleanrooms, pharmaceutical manufacturing, laboratories, and industrial environments — not residential use. Detection components are sourced from leading Swiss and Japanese manufacturers, with RS-485 Modbus RTU, 4-20mA, 0-10V, and Wi-Fi connectivity. Ace Instruments has delivered IAQ Detectors instruments across 1,000+ projects worldwide.

Founder: Mr. Jagdish Sachdeva
Contact: +91-8121025651 | sales@iaqdetectors.com
Website: https://iaqdetectors.com

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## Company Overview

- [About IAQ Detectors](https://iaqdetectors.com/about/): Founded 1991 by Mr. Jagdish Sachdeva in Hyderabad, India. Operates a 10,000 sq.ft manufacturing and design facility. CE certified, ISO 9001:2015. One of India's leading commercial IAQ instrument manufacturers, built on Swiss and Japanese detection components for accuracy and long-term stability.
- [Contact](https://iaqdetectors.com/contact/): Phone +91-8121025651, Email sales@iaqdetectors.com
- [Product Catalogue](https://iaqdetectors.com/product/): Full catalogue of IAQ Detectors instruments organized by parameter category — indoor air quality, CO2, carbon monoxide, VOC, particulate matter, temperature & humidity, differential pressure, oxygen, and LEL/combustible gas.
- [Privacy Policy](https://iaqdetectors.com/privacy-policy/)

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## Product Categories & Instruments

### Indoor Air Quality — [/product/indoor-air-quality/](https://iaqdetectors.com/product/indoor-air-quality/)
Multi-parameter category combining CO2, VOC, particulate matter, temperature, and humidity in a single instrument for overall building IAQ assessment.

1. **6-in-1 IAQ Monitor — AI-IAQ6-PH** — [Product Page](https://iaqdetectors.com/product/indoor-air-quality/6-in-1-iaq-monitor/)
   Wall-mounted instrument measuring six parameters simultaneously: CO2 (0–5,000 ppm, ±50 ppm, latest-generation Swiss sensor), TVOC/VOC (0–500 ppm or 0–65,000 ppb, ±30 ppm), PM2.5 and PM10 (0–1,000 µg/m³ each), temperature (0–50°C, ±0.5°C), and humidity (0–100%RH, ±3%RH). 3.5" touchscreen with red alarm-state indication. RS-485 Modbus or Wi-Fi connectivity (selected at order), with the Wi-Fi variant including a browser-based dashboard, chart history, and remote access. Used for green-building monitoring credits under LEED, WELL Standard v2, BREEAM, and GRIHA 2019, and for general office, school, hospital, and commercial-building IAQ surveillance with BMS/SCADA integration via Modbus.

2. **Duct IAQ Transmitter — AI-IAQ-D** — *Content in production; page not yet published*
   Duct-mounted equivalent of the 6-in-1 monitor for return/supply air monitoring of CO2, VOC, PM2.5/PM10, temperature, and humidity within HVAC air handling units.

### Carbon Dioxide (CO2) — [/product/co2/](https://iaqdetectors.com/product/co2/)
DCV and ventilation-rate monitoring against the ASHRAE 62.1-2022 1,100 ppm acceptable-ventilation threshold and the WELL Standard v2 800 ppm optimal-cognition target.

3. **CO2 Transmitter — AI-CO2** — [Product Page](https://iaqdetectors.com/product/co2/carbon-dioxide-transmitter/)
   Wall- or duct-mount transmitter using a photoacoustic (PAS) detection component from Switzerland. Selectable ranges 0–2,000 / 0–5,000 / 0–10,000 / 0–20,000 ppm, accuracy ±(40 ppm + 3% of reading). Optional LCD or blind transmitter variant. Outputs: 4-20mA, 0–10VDC, RS-485 Modbus RTU, optional relay (NO/NC, 2A). Three programmable alarm thresholds (high / high-high / extreme-high). CE certified. Referenced against ASHRAE 62.1-2022, OSHA permissible exposure limits, LEED v5, GRIHA 2019, and WELL Standard v2. Deployed for demand-controlled ventilation (DCV) in offices, classrooms, airports, hospitals, operating theatres, cleanrooms, cold storage, and greenhouses.

4. **Duct CO2 Transmitter — AI-CO2-D** — [Product Page](https://iaqdetectors.com/product/co2/duct-carbon-dioxide-transmitter/)
   Duct-mount photoacoustic CO2 transmitter, ranges 0–2,000 / 0–5,000 / 0–10,000 ppm, ±5% accuracy in the 0–1,000 ppm band. Outputs: 0–10VDC, 4-20mA, optional RS-485 Modbus. ABS duct enclosure with mounting bracket. Referenced against ASHRAE 62.1-2022, OSHA 5,000 ppm 8-hour TWA, WELL Standard v2 (>1,000 ppm alert), LEED, GRIHA, and ASHRAE 170-2021. Used for DCV in AHU return air, infection control airflow monitoring in healthcare, and surgical-suite scavenging verification.

5. **CO2 + Temperature & Humidity Monitor — AI-CO2-IAQ** — [Product Page](https://iaqdetectors.com/product/co2/carbon-dioxide-temperature-humidity-monitor/)
   Combined wall-mount instrument: CO2 0–5,000 / 0–10,000 / 0–20,000 ppm (±50 ppm, Swiss photoacoustic component), temperature 0–50°C (±0.5°C), humidity 0–100%RH (±1.8%RH at 10–95%RH). 128×64 graphic backlit LCD; optional touchscreen. Optional RS-485 Modbus for BMS/EMS integration. Used in schools, hotels, public assembly areas, warehouses, and cold storage requiring combined CO2/T/RH tracking on one device.

6. **CO2 Controller (Demand-Controlled Ventilation) — AI-CO2-RLCD** — *Content in production; page not yet published*
   CO2-based ventilation controller intended for DCV across offices, schools, and greenhouses (broadened from a prior mushroom-farm-only positioning to general commercial DCV applications).

### Carbon Monoxide (CO) — [/product/carbon-monoxide/](https://iaqdetectors.com/product/carbon-monoxide/)
Parking structure, industrial, and HVAC-duct CO surveillance referencing WHO 8-hour and annual-average thresholds and OSHA 8-hr TWA limits.

7. **Carbon Monoxide Transmitter — AI-CO** — [Product Page](https://iaqdetectors.com/product/carbon-monoxide/carbon-monoxide-transmitter/)
   Wall-mount instrument using a Japanese electrochemical CO detection component rated for 10+ years' service life. Ranges 0–100 / 0–150 / 0–250 / 0–500 ppm, accuracy ±5%, response time under 60 seconds. Meets UL2034, EN50291, and EN54-31. Operating range -10°C to +60°C. Outputs: 0–10VDC, 4-20mA, RS-485 Modbus, one relay (NO/NC, 2A). IP54 ABS enclosure. CE certified. Referenced against NBC India 2016 Part 8, ISHRAE 10001:2016, GRIHA, IGBC, Estidama (UAE), Mostadam (Saudi Arabia), CASBEE (Japan), BREEAM Hea 02, HQE Target 13 (France), and LEED v4.1 (10 ppm alert threshold). Used in underground/multi-level parking, oil and gas facilities, boiler rooms, engine test rooms, tunnels, mines, and semiconductor manufacturing, integrated with VFD-driven ventilation for parking-basement DCV.

8. **Duct Carbon Monoxide Transmitter — AI-CO-D** — [Product Page](https://iaqdetectors.com/product/carbon-monoxide/duct-carbon-monoxide-transmitter/)
   Duct-mount electrochemical CO transmitter, ranges 0–100 / 0–250 / 0–500 ppm, accuracy ±5 ppm or ±5% of reading (whichever is greater), T90 response under 60 seconds. Field-selectable 4-20mA or 0–10VDC, optional relay and RS-485 Modbus. ABS duct enclosure, 12-month warranty. Certified UL2034, EN50291, EN54-31, CE, ISO 9001:2015. Functions as a direct retrofit for Greystone CMD5B, Siemens QPA/QPB, Honeywell HSCM/E3Point, Dwyer GSTA/GSTC, and Belimo 22CG duct CO instruments.

### Volatile Organic Compounds (VOC) — [/product/voc/](https://iaqdetectors.com/product/voc/)
TVOC surveillance using Swiss PID/MOX detection components, including IVF laboratory air quality referencing ESHRE guidelines (TVOC <500 µg/m³).

9. **VOC Detector — AI-VOC-D** — [Product Page](https://iaqdetectors.com/product/voc/volatile-organic-compound-detector/)
   Wall-mount TVOC detector with a Swiss Metal Oxide (MOX) detection component sensitive to formaldehyde, benzene, and most indoor VOCs. Measures TVOC 0–500 ppm (±15 ppm max @ 25°C/50%RH) and temperature 0–50°C (±0.5°C). LED display, IP54 ABS enclosure. Outputs: 0–10VDC, dual 4-20mA (VOC and temperature separately), optional RS-485 Modbus RTU. Used in offices, retail, hotels, museums, art galleries, pharmaceutical manufacturing, cleanrooms, and laboratories.

10. **Duct VOC Detector — AI-VOC-DT** — [Product Page](https://iaqdetectors.com/product/voc/duct-volatile-organic-compound-detector/)
    Duct-mount version of the VOC detector for HVAC return/supply air. Same Swiss MOX detection component, VOC 0–500 ppm (±15 ppm max), temperature 0–50°C (±0.5°C). Outputs: 0–10VDC, dual 4-20mA, optional RS-485 Modbus. ABS duct enclosure with mounting bracket. Used where TVOC must be tracked in the airstream rather than the occupied space.

11. **VOC + Temperature & Humidity Monitor — AI-VOC-TRH** — [Product Page](https://iaqdetectors.com/product/voc/voc-temperature-humidity-monitor/)
    Three-parameter wall-mount instrument: VOC 0–500 ppm or 0–65,000 ppb (±10% of reading), temperature 0–50°C (±0.5°C), humidity 0–100%RH (±1.8%RH). MOX-based VOC component paired with a digital T/RH component. 3.5" touchscreen, RS-485 Modbus or Wi-Fi with browser dashboard. Used in pharmaceutical manufacturing, laboratories, printing facilities, commercial kitchens, retail, and schools.

12. **IVF Lab VOC Monitor — AI-VOC-TRH** — [Product Page](https://iaqdetectors.com/product/voc/ivf-lab-voc-monitor/)
    IVF-laboratory-specific configuration of the VOC + T/RH monitor for embryo and gamete viability environments. Same specifications: VOC 0–500 ppm/0–65,000 ppb (±10%), temperature 0–50°C (±0.5°C), humidity 0–100%RH (±1.8%RH). 3.5" touchscreen, RS-485 Modbus and Wi-Fi dashboard. Referenced against European Society of Human Reproduction and Embryology (ESHRE) IVF laboratory air quality guidelines (TVOC <500 µg/m³). *Note: currently shares model number AI-VOC-TRH with the general-purpose VOC + T/RH Monitor — engineering differentiation pending.*

### Particulate Matter (PM2.5/PM10) — [/product/particulate-matter/](https://iaqdetectors.com/product/particulate-matter/)
Fine-dust monitoring referenced against WHO 2021 Air Quality Guidelines and WELL Standard v2 occupied-space PM2.5 thresholds.

13. **Particulate Matter Detector — AI-PM-D** — [Product Page](https://iaqdetectors.com/product/particulate-matter/particulate-matter-detector/)
    Wall-mount fine-dust instrument measuring PM1, PM2.5, and PM10 using a Swiss laser-scattering optics component. Range 0–1,000 µg/m³, accuracy ±15 µg/m³ below 100 µg/m³ and ±15% above. Field-selectable display/output pairing: PM2.5+PM10 or PM1+PM10. Dual 4-20mA outputs, RS-485 Modbus, programmable buzzer with colour-coded LED alarm. IP54 ABS enclosure. WHO 2021 guideline values: PM2.5 5 µg/m³ annual / 15 µg/m³ 24-hour; PM10 15 µg/m³ annual / 45 µg/m³ 24-hour. WELL Standard v2 occupied-space PM2.5 limit: <35 µg/m³.

14. **Duct Particulate Matter Transmitter — AI-PM-DT** — [Product Page](https://iaqdetectors.com/product/particulate-matter/duct-particulate-matter-transmitter/)
    Duct-mount PM2.5/PM10 transmitter for HVAC supply/return air, 0–1,000 µg/m³, same accuracy profile as the room-type detector, plus temperature 0–50°C (±0.5°C). IP54 ABS duct enclosure with adjustable clamp, optional RS-485 Modbus. Commonly used to verify HEPA, ULPA, and MERV filter performance by comparing PM levels before and after the filter bank, and for AHU inlet/outlet monitoring.

### Temperature & Humidity — [/product/temperature-humidity/](https://iaqdetectors.com/product/temperature-humidity/)
Room, duct, immersion, and alarm-monitor instruments referenced against ASHRAE 55-2023 comfort bands and EU GMP/server-room environmental targets.

15. **T/RH Transmitter, Built-in Sensor — AI-RHT-Tx** — [Product Page](https://iaqdetectors.com/product/temperature-humidity/room-type-transmitter/)
    Precision room transmitter with a built-in CMOS Humi-Temp component. Temperature 0–50°C (±0.5°C, 0.1°C resolution), humidity 0–100%RH (±1.8%RH at 10–95%RH; ±2%RH elsewhere). Response under 10 seconds. 128×64 graphic LCD (display-free variant available). Dual 4-20mA and 0–10VDC, RS-485 Modbus. ABS wall-mount enclosure. Functions as a retrofit for Greystone HA/HTD, Siemens QFA, Honeywell SCT/TR, BAPI, Veris Industries, and ACI transmitters. Used in GDP pharmaceutical warehouses, server rooms, cleanrooms, hospital isolation wards, operating theatres, and museum/archive preservation.

16. **T/RH Transmitter, External Probe — AI-RHT1-PH** — [Product Page](https://iaqdetectors.com/product/temperature-humidity/external-probe-transmitter/)
    Wall-mount transmitter with a 10-metre wired external probe for remote sensing points. Swiss digital T/RH component, temperature 0–50°C (±0.5°C), humidity 0–100%RH (±1.8%RH at 10–95%RH; ±2%RH elsewhere). IP65 ABS enclosure, RS-485 Modbus. Used in data centers, GDP warehouse monitoring, food/beverage storage, chemical manufacturing, and smart agriculture where the sensing point is hard to access directly.

17. **Duct Temperature & Humidity Monitor — AI-RHTx-D** — [Product Page](https://iaqdetectors.com/product/temperature-humidity/duct-temperature-humidity-monitor/)
    Duct-mount transmitter with a capacitive polymer sensing element unaffected by condensation. Temperature 0–50°C (±0.5°C), humidity 0–95%RH (±1.8%RH). Dual 4-20mA outputs. IP65 duct enclosure with adjustable clamp. Used for HVAC AHU temperature/humidity monitoring across offices, hospitals, and hotels.

18. **Dew Point Transmitter — AI-DEW-TRH** — *Content in production; page not yet published*
    Dew-point monitoring transmitter for HVAC and compressed-air drying applications where condensation risk must be tracked alongside humidity.

19. **Immersion Temperature Sensor — AI-200 / AI-200-T** — [Product Page](https://iaqdetectors.com/product/temperature-humidity/immersion-temperature-sensor/)
    Pipe/liquid immersion temperature instrument in RTD Pt100, RTD Pt1000, or NTC 10k configurations, 0.1°C accuracy (Pt1000/NTC variants). Probe lengths 50/75/100mm, thread options ½" BSP, ½" NPT, ¼" BSP, cable lengths 1–3m. Thermowell in SS304 (standard) or SS316 (food-grade/hygienic). Connects to DDC controllers, energy meters, VAV controllers, and chiller/boiler controllers. Referenced against USFDA requirements, EU GMP, and ASHRAE Guideline 22 chilled-water efficiency. Used in data center cooling loops, chilled/hot water lines, food and beverage processing, and pharmaceutical manufacturing.

20. **Server Room Temperature Monitor — AI-TAM1 / AI-TAM1-IOT** — [Product Page](https://iaqdetectors.com/product/temperature-humidity/server-room-temperature-monitor/)
    Stand-alone alarm monitor for server rooms, data centers, and critical storage. Range -50°C to +200°C, ±0.5°C accuracy. 4-digit red 7-segment LED, front-panel programmable alarm limits, built-in 50dB buzzer, external alarm cable extendable to 100m. AI-TAM1-IOT variant adds SMS and email alerting. Used in server rooms, hospital medication/vaccine storage, pharmaceutical cold rooms, and greenhouse monitoring where a stand-alone alarm is preferred over full BMS integration.

### Differential Pressure — [/product/pressure/](https://iaqdetectors.com/product/pressure/)
Cleanroom, HVAC, and filter-monitoring pressure instruments referenced against ISO 14644-1 cleanroom classification and EU GMP Annex 1 (2022).

21. **Cleanroom Differential Pressure Indicator — AI-DDPG / DP-1-1** — [Product Page](https://iaqdetectors.com/product/pressure/cleanroom-differential-pressure-indicator/)
    Flush-mount differential pressure indicator for cleanroom modular walls (30mm depth). Factory-settable spans from -10 to +10 mm.W.C. up to 0–1,000 Pa, ±0.5% full scale. 4-20mA analog plus isolated RS-485 Modbus for BMS/SCADA/PLC. Used in cleanrooms, laminar airflow cabinets, biosafety cabinets, pharmaceutical manufacturing suites, and hospital isolation rooms. ISO 14644-1 ISO 5 cleanrooms require ≥12.5 Pa positive pressure differential.

22. **Differential Pressure Transmitter — AI-DPTx** — [Product Page](https://iaqdetectors.com/product/pressure/differential-pressure-transmitter/)
    CE certified, Made-in-India transmitter with jumper-selectable ranges: 0–100 / ±100 / 0–250 / ±250 / 0–500 / ±500 / 0–750 / ±750 / 0–1,000 / ±1,000 Pa (custom ranges available). Accuracy ±0.5% full scale. Field-selectable 4-20mA (2-wire) or 0–10VDC (3-wire). ABS enclosure, hinged cover, hose-nipple ports. Used for HEPA/filter status monitoring, AHU and raised-floor DP in data centers, isolation-room pressure control, fume hood monitoring, and EU GMP Annex 1 (2022)/FDA/ISO-compliant pharmaceutical pressure cascades.

23. **Duct Static Pressure Transmitter — AI-DP-S** — [Product Page](https://iaqdetectors.com/product/pressure/duct-static-pressure-transmitter/)
    Duct static pressure transmitter, base range 0–400 Pa (customizable to 0–500 Pa), ±0.5% full scale, 250ms response. Media: air or non-corrosive gases. Jumper-selectable 4-20mA or 0–10VDC. Supplied with static pressure probe and 2m silicone tubing. Used in VAV systems for VFD fan-speed modulation, operating-room positive-pressure maintenance, and general HVAC zoning.

### Oxygen Deficiency — [/product/oxygen/](https://iaqdetectors.com/product/oxygen/)
24. **Oxygen Deficiency Detector — AI-O2-Tx** — [Product Page](https://iaqdetectors.com/product/oxygen/oxygen-deficiency-detector/)
    Weatherproof transmitter using a quick-response Japanese galvanic cell detection component. Ranges 0–25.0% O2 or 0–100% O2, ±1% of measuring range. IP65 ABS enclosure. 4-20mA retransmission, optional RS-485 Modbus, optional relay, built-in buzzer. Referenced against OSHA 29 CFR 1910.146 confined-space thresholds (19.5% deficiency, 23.5% enriched). Used for confined-space personnel safety, food-industry refrigeration, biotechnology, flue gas analysis, and oxygen generation plants.

### LEL / Combustible Gas — [/product/lel/](https://iaqdetectors.com/product/lel/)
25. **Hydrogen/LEL Detector — AI-LEL-FLP** — [Product Page](https://iaqdetectors.com/product/lel/hydrogen-detector-battery-banks/)
    Flameproof detector for lower explosive limit (LEL) concentrations of hydrogen in battery rooms. Range 0–100% LEL, ±2% full-scale accuracy, Japanese catalytic combustion detection component. 4-20mA, optional dual relay outputs, RS-485 Modbus. Flameproof aluminium LM-6 body, CIMFR Dhanbad certified for Gas Group Areas I, II, IIA, IIB. Used in battery storage facilities (UPS rooms, EV charging stations), data center battery banks, oil and gas facilities, and chemical manufacturing.

### Air Changes per Hour — [/product/air-changes-per-hour/](https://iaqdetectors.com/product/air-changes-per-hour/)
Informational hub — ACH guidance per ASHRAE 62.1-2022 (general office 4–10 ACH, school classrooms 4–12 ACH, hospital patient room 6 ACH minimum, operating theatre 15–25 ACH, ISO 5 cleanroom up to 600 ACH, server room 20–30 ACH recommended). No standalone product; references CO2, IAQ, and ventilation instrument pages.

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## Applications

- [Office Buildings](https://iaqdetectors.com/applications/office-buildings/): IAQ monitoring per WELL Standard v2 Feature 04, LEED v4 Enhanced IAQ Monitoring credit, ASHRAE 62.1-2022 (1,100 ppm CO2 limit), and GRIHA 2019
- [Retail Spaces](https://iaqdetectors.com/applications/retail-spaces/): Ventilation per ASHRAE 62.1-2022 (0.06 cfm/ft² + 7.5 cfm/person), WELL Standard v2, and BEE ECBC-encouraged demand-controlled ventilation
- [Auditoriums](https://iaqdetectors.com/applications/auditoriums/): Dense-occupancy ventilation per ASHRAE 62.1-2022 Assembly Occupancy (7.5 cfm/person), ASHRAE 55-2023 thermal comfort, and NBC India
- [Educational Institutions](https://iaqdetectors.com/applications/educational-institutions/): Classroom ventilation per ASHRAE 62.1-2022 Educational (0.12 cfm/ft² + 7.5 cfm/person), WELL Standard v2 for Education, NBC India, and the SINPHONIE 2012 study (50% of European classrooms exceeding 1,000 ppm CO2)
- [Museums](https://iaqdetectors.com/applications/museums/): Collection environment management per PAS 198:2012, ASHRAE Technical Committee 9.9, and ICOM guidelines
- [Hospitals & Labs](https://iaqdetectors.com/applications/hospitals-labs/): Healthcare and cleanroom ventilation per ASHRAE 170-2021, EU GMP Annex 1 (2022), NABH, ESHRE IVF laboratory guidelines, and ISO 14644-1

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## Measured Parameters Reference

| Parameter | Measurement Details | Key Models |
|-----------|---------------------|------------|
| CO2 (Carbon Dioxide) | 0–20,000 ppm; photoacoustic (PAS) component; Switzerland | AI-CO2, AI-CO2-D, AI-IAQ6-PH, AI-CO2-IAQ, AI-CO2-RLCD |
| CO (Carbon Monoxide) | 0–500 ppm; electrochemical component; 10+ yr life; Japan | AI-CO, AI-CO-D |
| VOC / TVOC | 0–500 ppm or 0–65,000 ppb; MOX/PID component; Switzerland | AI-VOC-D, AI-VOC-DT, AI-VOC-TRH, AI-IAQ6-PH |
| PM1, PM2.5, PM10 | 0–1,000 µg/m³; laser-scattering optics; Switzerland | AI-PM-D, AI-PM-DT, AI-IAQ6-PH |
| Temperature (room/duct) | 0–50°C; CMOS or capacitive polymer component | AI-RHT-Tx, AI-RHT1-PH, AI-RHTx-D |
| Temperature (immersion) | RTD Pt100, Pt1000, NTC 10k; ±0.1°C | AI-200, AI-200-T |
| Temperature (alarm) | -50°C to +200°C; LED display; SMS/email alert option | AI-TAM1, AI-TAM1-IOT |
| Dew Point | HVAC/compressed-air condensation monitoring | AI-DEW-TRH (pending) |
| Humidity (RH) | 0–100%RH; CMOS or capacitive polymer component | AI-RHT-Tx, AI-RHT1-PH, AI-RHTx-D |
| O2 (Oxygen) | 0–25% or 0–100%; galvanic cell; Japan | AI-O2-Tx |
| Differential Pressure | -1,000 to +1,000 Pa; ±0.5% FS | AI-DPTx, AI-DDPG, DP-1-1 |
| Static Pressure (duct) | 0–500 Pa; 250ms response | AI-DP-S |
| LEL / H2 (Hydrogen) | 0–100% LEL; catalytic combustion; Japan; flameproof | AI-LEL-FLP |
| ACH (Air Changes/Hour) | Guidance per ASHRAE 62.1-2022 by space type | Cross-referenced across IAQ, CO2, ventilation pages |

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## Instrument Selection by Form Factor

### Wall-Mount / Room-Type
6-in-1 IAQ Monitor (AI-IAQ6-PH) · CO2 Transmitter (AI-CO2) · CO2 + T/RH Monitor (AI-CO2-IAQ) · CO Transmitter (AI-CO) · VOC Detector (AI-VOC-D) · VOC + T/RH Monitor (AI-VOC-TRH) · IVF Lab VOC Monitor (AI-VOC-TRH) · PM Detector (AI-PM-D) · T/RH Transmitter — Built-in (AI-RHT-Tx) · T/RH Transmitter — External/IP65 (AI-RHT1-PH) · Dew Point Transmitter (AI-DEW-TRH) · O2 Detector — IP65 (AI-O2-Tx) · Cleanroom DP Indicator (AI-DDPG/DP-1-1) · DP Transmitter (AI-DPTx) · Server Room Temperature Monitor (AI-TAM1/AI-TAM1-IOT)

### Duct-Mount / HVAC
Duct CO2 Transmitter (AI-CO2-D) · Duct CO Transmitter (AI-CO-D) · Duct VOC Detector (AI-VOC-DT) · Duct PM Transmitter (AI-PM-DT) · Duct T/RH Monitor (AI-RHTx-D) · Duct Static Pressure Transmitter (AI-DP-S) · Duct IAQ Transmitter (AI-IAQ-D)

### Pipe / Liquid Immersion
Immersion Temperature Sensor — RTD Pt100, Pt1000, NTC 10k (AI-200/AI-200-T)

### Flameproof / Hazardous Area
Hydrogen/LEL Detector — CIMFR certified, flameproof aluminium LM-6 body (AI-LEL-FLP)

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## Instrument Selection by Output Type

| Output | Instruments |
|--------|-------------|
| 4-20mA | CO2, CO, VOC, PM, T/RH transmitters, O2 detector, DP transmitters, LEL detector, all duct variants |
| 0–10VDC | CO2, CO, VOC, DP transmitters, duct CO and VOC variants |
| RS-485 Modbus RTU | CO2, CO, PM, T/RH transmitters, O2 detector, DP transmitters, cleanroom pressure indicator, LEL detector, AI-IAQ6-PH, all duct variants |
| Wi-Fi + Web Dashboard | AI-IAQ6-PH, AI-VOC-TRH (VOC T/RH Monitor and IVF Lab VOC Monitor) |
| Relay output | CO2, CO, O2, LEL detectors, duct CO transmitter |
| RTD / NTC resistance | Immersion Temperature Sensor (Pt100, Pt1000, NTC 10k) |
| SMS & Email alerts | AI-TAM1-IOT (Server Room Temperature Monitor) |

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## Instrument Selection by Application

| Application | Recommended Instruments |
|-------------|--------------------------|
| HVAC / BMS / SCADA integration | CO2, CO, VOC, PM, T/RH, DP transmitters, duct static pressure, all duct-mount variants |
| Demand Controlled Ventilation (DCV) | CO2 transmitters (wall/duct), CO transmitters, CO2 Controller (AI-CO2-RLCD) |
| Cleanrooms / pharmaceutical manufacturing | Cleanroom DP Indicator (AI-DDPG), DP Transmitter (AI-DPTx), CO2 transmitter, T/RH transmitters, Immersion Temperature Sensor |
| Parking garages / underground basements | CO Transmitter (AI-CO), Duct CO Transmitter (AI-CO-D) |
| Green building certification (LEED, WELL, BREEAM, GRIHA, IGBC) | 6-in-1 IAQ Monitor (AI-IAQ6-PH), CO2 Transmitter (AI-CO2), CO Transmitter (AI-CO), PM Detector (AI-PM-D) |
| Warehouses / cold storage / GDP compliance | CO2 + T/RH Monitor (AI-CO2-IAQ), T/RH Transmitter External (AI-RHT1-PH), Immersion Temperature Sensor |
| Data centers / server rooms | Server Room Temperature Monitor (AI-TAM1/AI-TAM1-IOT), T/RH Transmitter (AI-RHT-Tx), DP Transmitter (AI-DPTx), O2 Detector (AI-O2-Tx) |
| IVF laboratories / fertility clinics | IVF Lab VOC Monitor (AI-VOC-TRH) |
| Battery rooms / UPS rooms / energy storage | Hydrogen/LEL Detector (AI-LEL-FLP) |
| Hospitals / healthcare / isolation rooms | CO2, CO, T/RH transmitters, DP Transmitter (AI-DPTx), Cleanroom DP Indicator (AI-DDPG) |
| Industrial / oil & gas / hazardous areas | LEL Detector (flameproof, CIMFR certified), CO Transmitter (AI-CO), O2 Detector (AI-O2-Tx) |
| Food & beverage / pharma processing | Immersion Temperature Sensor SS316 (AI-200-T), T/RH Transmitter External (AI-RHT1-PH) |
| Air filter performance monitoring (HEPA/MERV/ULPA) | Duct PM Transmitter (AI-PM-DT), DP Transmitter (AI-DPTx) |
| VAV / VFD fan speed control | Duct Static Pressure Transmitter (AI-DP-S) |
| Museum / archive / library preservation | T/RH Transmitter — Built-in (AI-RHT-Tx) |

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## Connectivity & Integration

- **RS-485 Modbus RTU** — available across all transmitters; direct integration with BMS, PLC, SCADA, EMS, and DDC systems
- **Wi-Fi + Web Dashboard** — AI-IAQ6-PH and AI-VOC-TRH; live parameter view, chart history, custom reports, browser-based remote access
- **4-20mA analog** — universal output across the transmitter range; compatible with any standard controller, data logger, or PLC input
- **0–10VDC** — CO2, CO, VOC, and differential pressure transmitters
- **Relay outputs** — CO2, CO, O2, and LEL detectors for alarm activation or ventilation control
- **Resistance output (RTD/NTC)** — Immersion Temperature Sensor; connects directly to DDC controllers, VAV boxes, chiller controllers
- **SMS & Email alerts** — AI-TAM1-IOT Server Room Temperature Monitor

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## Standards & Certifications

- **CE certified** — product-level certification across the range
- **ISO 9001:2015** — Ace Instruments manufacturing quality management
- **ASHRAE 62.1-2022** — Ventilation for Acceptable Indoor Air Quality
- **ASHRAE 55-2023** — Thermal Comfort
- **ASHRAE 170-2021** — Ventilation of Health Care Facilities
- **ASHRAE Guideline 22** — Chilled water energy efficiency
- **LEED v4.1 / v5** — Indoor Environmental Quality credits
- **WELL Standard v2** — Air quality parameter monitoring (Feature 04)
- **BREEAM** — Hea 02 Indoor Air Quality
- **GRIHA 2019** — Green Rating for Integrated Habitat Assessment (India)
- **IGBC** — Indian Green Building Council
- **NBC India 2016 Part 8** — National Building Code
- **ISHRAE 10001:2016** (India)
- **OSHA 29 CFR 1910.146** — Permissible exposure limits, confined-space oxygen deficiency
- **WHO 2021 Air Quality Guidelines** — PM2.5/PM10 thresholds
- **EU GMP Annex 1 (2022 revision)** — Pharmaceutical cleanroom differential pressure
- **ISO 14644-1** — Cleanroom classification
- **ESHRE Guidelines** — European Society of Human Reproduction and Embryology, IVF laboratory air quality (TVOC <500 µg/m³)
- **NABH** — National Accreditation Board for Hospitals (India)
- **Estidama** (UAE Pearl Rating System) · **Mostadam** (Saudi Arabia) · **CASBEE** (Japan) · **HQE** (France)
- **UL2034, EN50291, EN54-31** — CO detection component certifications
- **CIMFR Dhanbad** — Flameproof certification, LEL/H2 detector, Gas Group Areas I, II, IIA, IIB
- **EU GMP, USFDA** — Pharmaceutical and food-grade compliance (Immersion Temperature Sensor)

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## Blog & Technical Resources

- [IAQ Monitoring Guide for the Workplace](https://iaqdetectors.com/blogs/indoor-air-quality-monitoring-guide-for-workplace)
- [India Indoor Air Quality Standards — Comprehensive Guide](https://iaqdetectors.com/blogs/india-indoor-air-quality-standards-a-comprehensive-guide)
- [Carbon Dioxide Monitoring: What You Need to Know](https://iaqdetectors.com/blogs/carbon-dioxide-monitoring-what-you-need-to-know-to-improve-indoor-air-quality)
- [The Importance of PM Monitoring for Indoor Air Quality](https://iaqdetectors.com/blogs/the-importance-of-pm-monitoring-for-indoor-air-quality)
- [IAQ Monitoring in Commercial Spaces](https://iaqdetectors.com/blogs/the-importance-of-indoor-air-quality-monitoring-in-commercial-spaces)
- [Optimising HVAC Systems with Temperature & Humidity Transmitters](https://iaqdetectors.com/blogs/optimising-hvac-systems-with-temperature-and-humidity-transmitters)
- [Revolutionising IAQ: IoT-Based Monitoring Platform](https://iaqdetectors.com/blogs/revolutionising-iaq-iot-based-indoor-air-quality-monitoring-platform)
- [Hydrogen Detectors in Battery Rooms: Types, Uses, Installation](https://iaqdetectors.com/blogs/4-hydrogen-detectors-in-battery-rooms-types-uses-installation)
- [GMP Guide for Temperature Monitoring Compliance](https://iaqdetectors.com/blogs/gmp-guide-for-temperature-monitoring-compliance)
- [Why Carbon Monoxide Detectors in Garages Are Beneficial](https://iaqdetectors.com/blogs/why-carbon-monoxide-detectors-beneficial-in-garages)
- [What is Air Quality Index and the UBA Standard](https://iaqdetectors.com/blogs/what-is-air-quality-index-uba-standard)

*Note: a 14-post Indoor Air Quality blog cluster (9 GEO-priority informational topics + 5 high-volume keyword posts) is in production under the new content architecture and will be added to this section once published.*