Toxic Gas Sensor for Environmental Monitoring RS485 SDI12

Key Features

Single toxic gas concentration monitoring with multiple gas sensor options
Electrochemical sensing technology for stable gas concentration measurement
Optional gases include NH3 H2S CO NO NO2 SO2 PH3 H2 ETO HCN HCl Cl2 O2
Built-in temperature compensation for more stable measurement output
Low baseline drift high sensitivity and long service life
Optional SDI-12 V1.3 or RS485 Modbus RTU communication
Compatible with data loggers and remote monitoring systems
Low power consumption for battery-powered monitoring stations
5 to 28 V DC wide power input
Wall-mounted compact design for easy installation
Built-in surge protection, reverse power protection, and lightning protection
Default 2 m cable length with customization available
ODM and OEM customization available
Color Display with Bilingual Interface：160 × 128 color screen with Chinese and English interface options.
Built In Real Time Clock：Time-stamped data records help support traceability in field testing and research.
Flexible Power Options：Supports 3 AA alkaline batteries or a rechargeable lithium battery, with USB Type C 5V auxiliary power input.
Compact Handheld Design：170 × 80 × 40 mm body size for convenient carrying and field use.
Suitable for Agriculture and Research Applications：Ideal for soil moisture testing, greenhouse monitoring, soilless cultivation, crop research, environmental inspection, and irrigation management.

Product Description

1. Description

JWGas-Toxic(Z14) Toxic Gas Concentration Sensor is designed for reliable single-gas monitoring in environmental monitoring systems, laboratories, industrial sites, and remote data acquisition applications. Based on electrochemical sensing technology, it supports multiple gas options including NH3, H2S, CO, NO, NO2, SO2, PH3, H2, ETO, HCN, CH3SH, THT, HCl, Cl2, and O2.

With built-in temperature compensation, low baseline drift, low power consumption, and optional SDI-12 V1.3 or RS485 Modbus RTU output, this toxic gas sensor is easy to integrate with data loggers, IoT gateways, and multi-point monitoring platforms.

2. Product Overview

JWGas-Toxic(Z14) Toxic Gas Concentration Sensor is developed for monitoring the concentration of a selected target gas in field and laboratory environments. It is suitable for projects that require long-term toxic gas data collection, remote environmental monitoring, and integration with automated monitoring platforms.

The sensor can be supplied with either SDI-12 or RS485 Modbus RTU output, making it suitable for hydrometeorological stations, environmental monitoring networks, smart city systems, research laboratories, and industrial IoT monitoring projects. According to the supplier manual, the sensor supports 5–28 V DC power input, low static current, and a compact wall-mounted housing with a sensor body size of 111 × 25.5 mm.

Parameter
Model No.	JWGas-Toxic(Z14)
Product Type	Toxic Gas Concentration Sensor
Sensing Principle	Electrochemical gas sensing
Gas Detection	Single target gas
Output Options	SDI-12 V1.3 or RS485 Modbus RTU
Power Supply	5–28 V DC
SDI-12 Static Current	<500 μA @ 12 V DC
SDI-12 Measuring Current	<5 mA @ 12 V DC
RS485 Static Current	<2 mA @ 12 V DC
RS485 Measuring Current	<7 mA @ 12 V DC
Temperature Range	-40 to 80°C
Temperature Resolution	0.01°C
Typical Temperature Accuracy	±0.3°C
Protection Rating	IP50
Installation	Wall-mounted
Default Cable Length	2 m
Custom Cable Length	Available
Sensor Body Size	111 × 25.5 mm
Communication Protocol	Modbus RTU for RS485 version
Default RS485 Baud Rate	9600 bps

3. Dimension

4. Detectable Gas Options

Gas Type	Chemical Formula	Typical Range Options
Ammonia	NH3	0–100 ppm / 0–500 ppm
Hydrogen Sulfide	H2S	0–100 ppm / 0–1000 ppm
Carbon Monoxide	CO	0–500 ppm / 0–2000 ppm
Nitrogen Dioxide	NO2	0–20 ppm / 0–2000 ppm
Nitric Oxide	NO	0–250 ppm / 0–2000 ppm
Sulfur Dioxide	SO2	0–20 ppm / 0–2000 ppm
Phosphine	PH3	0–20 ppm / 0–1000 ppm
Hydrogen	H2	0–1000 ppm / 0–40000 ppm
Ethylene Oxide	ETO	0–10 ppm / 0–100 ppm / 0–500 ppm
Hydrogen Cyanide	HCN	0–50 ppm
Methyl Mercaptan	CH3SH	0–10 ppm
Tetrahydrothiophene	THT	0–50 mg/m³
Hydrogen Chloride	HCl	0–30 ppm
Chlorine	Cl2	0–10 ppm / 0–50 ppm / 0–200 ppm
Oxygen	O2	0–30%

5. Application Scenarios

Toxic gas concentration monitoring
Environmental monitoring stations
Laboratory gas monitoring
Industrial environmental data collection
Smart city air quality monitoring
Wastewater treatment plant monitoring
Chemical storage area monitoring
Agricultural and livestock gas monitoring
Remote IoT monitoring systems
Research and testing facilities

FAQ

Q

1. What gases can the JWGas-Toxic(Z14) sensor detect?

A

The JWGas-Toxic(Z14) sensor can detect one selected target gas, including NH3, H2S, CO, NO, NO2, SO2, PH3, H2, ETO, HCN, CH3SH, THT, HCl, Cl2, and O2. Other gas types can be customized depending on project requirements.
Q

2. Does this toxic gas sensor support RS485 output?

A

Yes. The sensor is available with RS485 Modbus RTU output, making it suitable for industrial controllers, IoT gateways, data loggers, and remote monitoring platforms.
Q

3. Can the sensor be used with SDI-12 data loggers?

A

Yes. The sensor also supports SDI-12 V1.3, which is commonly used in environmental monitoring, hydrology, meteorology, and low-power field data acquisition systems.
Q

4. Is JWGas-Toxic(Z14) suitable for battery-powered monitoring stations?

A

Yes. The sensor has low power consumption. The SDI-12 version has a static current of less than 500 μA at 12 V DC, while the RS485 version has a static current of less than 2 mA at 12 V DC.
Q

5. Can JWGas-Toxic(Z14) measure temperature?

A

Yes. The sensor includes temperature measurement and temperature compensation. The temperature range is -40 to 80°C, with 0.01°C resolution and typical accuracy of ±0.3°C.
Q

6. Can this sensor be used as a safety alarm device?

A

No. This product is intended for non-safety-related monitoring and data acquisition only. It should not be used for life safety protection, safety interlock control, or critical production safety compliance monitoring.
Q

7. What is the installation method?

A

The sensor uses a compact wall-mounted design. It is suitable for fixed-point gas monitoring in laboratories, environmental monitoring sites, industrial areas, and equipment rooms.
Q

8. Does JWGas-Toxic(Z14) support OEM or ODM customization?

A

Yes. OEM and ODM services are available, including gas type selection, cable length customization, output configuration, and project-based integration support.
Q

9. What is the power supply range?

A

The sensor supports a wide 5–28 V DC power input, which makes it compatible with different field monitoring systems and data acquisition devices.
Q

10. What applications is the JWGas-Toxic(Z14) sensor best suited for?

A

JWGas-Toxic(Z14) is suitable for toxic gas concentration monitoring, environmental monitoring, laboratory monitoring, industrial IoT monitoring, smart city environmental projects, and remote data collection systems.