Air Quality Sensor

INS-QT-RS485

This series of multi-in-one air quality sensors is developed for environmental monitoring and control in smart buildings. Equipped with a 32-bit high-performance microcontroller, it can monitor multiple parameters including PM2.5, PM10, carbon dioxide, carbon monoxide, formaldehyde, TVOC, temperature and humidity. Parameters can be freely combined or measured individually. It comes with relay output to automatically start and stop fans and purifiers. It also supports RS485 Modbus-RTU communication, which can connect with configuration software, PLC and DDC for remote monitoring and equipment control. Integrated with WiFi and Bluetooth wireless functions, it is widely used in hospitals, schools, hotels, office buildings, homes and other places. It is a cost-effective, stable and reliable intelligent environmental monitoring product.

Function Overview Specifications Dimensional Drawings and Wiring Diagrams Operation and Installation Instructions

Function Overview

Real-time simultaneous monitoring of multiple data including PM2.5, PM10, carbon monoxide, carbon dioxide, formaldehyde, TVOC, temperature and humidity;
Supports individual data collection and monitoring, with 0-10V/4-20mA/RS485 output for displaying each gas parameter;
Large-capacity data storage; data can be retained for one year without loss;
Built-in multiple communication protocols including MODBUS (wired RS485), WiFi and Bluetooth, compatible with various control system networks;
Optional standard building control signal output interfaces of 0~10V or 4~20mA.

Specifications

Basic Parameters

Program Memory:

Data Memory:

Electrical Isolation:

Mounting:

4MB

1024k (data retention for 1 year after power-off)

Test voltage: 500V DC for 24V DC circuit; 1460V AC for 220V AC circuit

Wall mounting or 86-type junction box mounting

Power Consumption

Power Supply:

Self Power Consumption:

Load Current:

DC24V (typical); optional 220VAC power supply; internal terminal power input: DC9V~36V;

<10W

< 0.8A

Particulate Sensor

Measuring Range:

Counting Efficiency:

Effective Concentration Range:

Maximum Concentration Range:

Resolution:

0.3~1.0; 1.0~2.5; 2.5~10 micrometers (μm)

50%@0.3μm, 98%@>=0.5μm

0~500μg/m³ (PM2.5 standard range)

0~2000μg/m³

1μg/m³

CO₂ Sensor

Measuring Range:

Resolution:

Max Error:

0~5000ppm

±50ppm+3% of reading

＜±5% FS

Formaldehyde Sensor

Effective Range:

Resolution:

Max Error:

0~1 mg/m³

0.001mg/m³

＜±5% FS

TVOC Sensor

Sensitive Gases:

Concentration Range:

Resolution:

Error:

Toluene, formaldehyde, benzene, alcohol, acetone...

1~5mg/m³

0.001mg/m³

＜±10% FS

Temperature Sensor

Measuring Range:

Resolution:

Accuracy:

-40~100℃

0.01℃

±0.5℃

Humidity Sensor

Measuring Range:

Resolution:

Accuracy:

0~99%RH

0.01%RH

±5%

CO Sensor

Measuring Range:

Resolution:

Max Error:

0~500ppm

±10ppm+3% of reading

＜±5% FS

Ozone Sensor

Measuring Range:

Resolution:

Max Error:

0~9999ppb

±10ppb+1% of reading

＜±5% FS

Output Signal

Any two channels can be selected as AO output with configurable 4~20mA or 0~10V

Customizable 220V power supply box and relay output controller

RS485 Output Parameters

Signal Type:

Connection:

Max Nodes:

Address:

Protocol:

Data Format:

Baud Rate:

RS485 digital signal output, multi-drop, full-duplex

2-wire, max communication distance 1200m, direct terminal connection

≤64

1-64, factory default address: 1

Standard MODBUS Protocol

1 start bit, 8 data bits, no parity, 1 stop bit

1200bit/s,2400bit/s,4800bit/s,9600bit/s,19200bit/s,28800bit/s,
38400bit/s (configurable at factory; default:9600bit/s)

Wiring

Terminal Block:

Cable Spec:

6-pin crimp terminal with 5.08mm pitch, contact resistance 0.02Ω

24～15AWG (0.2～2.5mm²), stripping length 6-7mm

Operating Environment

Operating Conditions:

Temperature -20...+60℃ Humidity 5...95%RH, non-condensing

Storage Conditions:

Temperature -30...+70℃ Humidity 5...95%RH, non-condensing

Dimensions

Panel Size:

Mounting Hole Spacing:

L×W×T: 86×86×26 (mm);

60~66mm (for standard 86 box horizontal / vertical mounting)

Protection Class

Enclosure Rating:

Flammability Class:

EMC:

IP22 Refer to IEC60529 / GB 4208

V-0 Refer to UL94

Compliant with IEC requirements; noise suppression to IEC61000-6-2; tests per IEC6100-4-2~6

Material & Weight

Housing:

Weight:

ABS+PC

Approx. 450g (total weight)

Operation and Installation Instructions

(1) Shielded cables must be used in environments with EMC issues. Twisted-pair cables shall be adopted for transformer secondary power supply lines and signal lines. During cable laying, note that longer parallel routing length and smaller spacing between cables will result in stronger electromagnetic interference.

(2) The monitoring module shall be installed at easily accessible locations. Do not mount it on ventilation structures of building roofs to avoid sunlight exposure!

(3) All functions of the monitoring module can only be tested 30 minutes after power-on at the operating voltage.

(4) To protect the product from damage and ensure personal safety of operators, installers shall wear anti-static gloves during installation, cut off power supply and avoid live-line operation.

(5) Shielded cables are recommended for connection to the controller to prevent noise interference.

(6) Pay attention to wiring of power positive (+24V), negative (GND) and digital signal terminals (A, B). Reversed connection is prohibited.

(7) High-concentration chemical contaminants may damage the internal circuit board of the controller. Therefore, store and use the product away from chemical pollution sources.

(8) Refer to relevant national installation standards for product installation.

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