JWGas-VNI(Z15) VOC NOx Air Quality Sensor is designed for indoor air quality monitoring, ventilation control, air purification systems, and laboratory environmental monitoring. It measures VOC Index, NOx Index, temperature, humidity, and dew point, helping users evaluate indoor air quality changes and optimize air treatment systems.
Based on an integrated Sensirion SGP41 air quality sensor, the device uses a VOC and NOx index algorithm with humidity compensation. It supports RS485 Modbus RTU or SDI-12 V1.3 digital output, making it easy to connect with data loggers, IoT gateways, building automation systems, and remote monitoring platforms.
2. Product Overview
JWGas-VNI(Z15) VOC NOx Air Quality Sensor is a compact digital sensor for indoor air quality monitoring applications. It measures VOC and NOx air quality index values instead of directly outputting a traditional TVOC concentration value. This makes it especially suitable for applications where users need to track air quality trends, ventilation demand, odor events, air pollution changes, and indoor environmental comfort.
Unlike traditional MOX-based TVOC sensors that may output different equivalent TVOC values depending on gas composition and calibration conditions, this sensor uses a VOC and NOx index algorithm. The VOC Index reflects changes in VOC events compared with the recent indoor air background, while the NOx Index helps indicate nitrogen oxide events. According to the manual, the VOC Index and NOx Index both use a 1–500 index scale.
The sensor supports SDI-12 and RS485 Modbus RTU, so it can be integrated into smart building systems, HVAC systems, air purification equipment, environmental monitoring stations, and industrial IoT platforms.
Parameters
Model No.
JWGas-VNI(Z15)
Measurement Parameters
VOC Index, NOx Index, temperature, humidity, dew point
Air Quality Sensor
Sensirion SGP41
VOC Index Range
1–500
VOC Index Resolution
1
NOx Index Range
1–500
NOx Index Resolution
1
Temperature Range
-40 to 125°C
Long-Term Operating Temperature
-40 to 80°C
Temperature Resolution
0.01°C
Typical Temperature Accuracy
Up to ±0.2°C
Humidity Range
0–100% RH
Humidity Resolution
0.01% RH
Typical Humidity Accuracy
Up to ±1.8% RH
Working Environment
-40 to 80°C, 0–95% RH non-condensing
Output Option 1
SDI-12 V1.3
Output Option 2
RS485 Modbus RTU
Power Supply
5–28 V DC
SDI-12 Static Current
<2 mA @ 12 V DC
SDI-12 Measuring Current
<5 mA @ 12 V DC
RS485 Static Current
<5 mA @ 12 V DC
RS485 Measuring Current
<10 mA @ 12 V DC
Protection Rating
IP50
Installation Method
Wall-mounted
Default Cable Length
2 m
Cable Customization
Available
Sensor Body Size
111 × 25.5 mm
OEM ODM
Available
3. Dimension
4. Application Scenarios
Indoor air quality monitoring
Air purification systems
Ventilation control systems HVAC monitoring
Laboratory environmental monitoring
Smart building air quality management
Office and classroom air monitoring
IAQ data logging systems
Environmental monitoring platforms
IoT-based air quality networks
Greenhouse and controlled environment monitoring
Public building air quality projects
FAQ
Q
1. What does the JWGas-VNI(Z15) VOC NOx Air Quality Sensor measure?
A
The JWGas-VNI(Z15) sensor measures VOC Index, NOx Index, temperature, humidity, and dew point for indoor air quality monitoring and environmental data acquisition.
Q
2. What is the VOC Index range?
A
The VOC Index range is 1 to 500, with a resolution of 1 index point. It helps indicate changes in volatile organic compound events in indoor air.
Q
3. What is the NOx Index range?
A
The NOx Index range is 1 to 500, with a resolution of 1 index point. It is used to indicate nitrogen oxide related air quality events.
Q
4. Does JWGas-VNI(Z15) directly measure TVOC concentration?
A
JWGas-VNI(Z15) outputs a VOC Index rather than a direct TVOC concentration value. This index-based output is useful for indoor air quality trend monitoring, air purification control, and ventilation optimization.
Q
5. Does this sensor support RS485 Modbus RTU?
A
Yes. JWGas-VNI(Z15) can be supplied with RS485 Modbus RTU output, making it suitable for IoT gateways, smart building controllers, PLC systems, and cloud monitoring platforms.
Q
6. Can JWGas-VNI(Z15) work with SDI-12 data loggers?
A
Yes. JWGas-VNI(Z15) supports SDI-12 V1.3, which is suitable for low-power data loggers and remote environmental monitoring systems.
Q
7. Does the sensor measure temperature and humidity?
A
Yes. The sensor measures temperature and humidity. The temperature range is -40 to 125°C, and the humidity range is 0 to 100% RH.
Q
8. What applications is this sensor suitable for?
A
It is suitable for indoor air quality monitoring, air purification systems, ventilation systems, HVAC monitoring, laboratory environmental monitoring, smart building systems, and IAQ data logging.
Q
9. Is JWGas-VNI(Z15) suitable for battery-powered monitoring systems?
A
Yes. The sensor has a low-power design. The SDI-12 version has a static current of less than 2 mA @ 12 V DC, making it suitable for low-power monitoring applications.
Q
10. What is the power supply range?
A
The sensor supports 5–28 V DC power input, which makes it compatible with different monitoring systems, data loggers, and IoT gateways.
Q
11. Can JWGas-VNI(Z15) be wall mounted?
A
Yes. JWGas-VNI(Z15) uses a compact wall-mounted structure. The sensor body size is 111 × 25.5 mm, making it easy to install in indoor monitoring points.
Q
12. Does JWGas-VNI(Z15) support OEM or ODM customization?
A
Yes. JWGas-VNI(Z15) supports OEM and ODM customization, including output interface, cable length, labeling, and project-based integration requirements.
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