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RS485 Output Wall Mounted CH2O Transmitter

This RS485 Formaldehyde Temperature and Humidity Transmitter is equipped with a high-precision electrochemical sensor, supporting the monitoring of formaldehyde concentration (0-5ppm), temperature (-40℃~+80℃), and humidity (0~100% RH). With a resolution of 0.01ppm, it boasts high measurement accuracy and rapid response. Adopting the ModBus-RTU protocol, the device offers a maximum communication distance of 2000 meters and features a wide DC voltage supply range (10-30V) for multi-scenario adaptation. Its waterproof wall-mounted design enables easy installation, and an optional OLED display is available. Supporting 24/7 continuous online monitoring, it is widely applicable in industrial environments, air purification equipment, and other scenarios.
  • Model No.:

    LW310D-CH2O(RS485)
  • Use:

    Formaldehyde monitoring
  • Power Supply:

    10~30VDC
  • Certificates:

    CE,ROHS
  • Customized Support:

    OEM, ODM
  • Warranty:

    1 Year
  • Product Detail

ZONEWU RS485 Formaldehyde (CH₂O) Transmitter



Key Applications & Use Cases

Formaldehyde Control in Chemical/Building Materials Production Workshops

Designed specifically for scenarios like chemical synthesis and wood-based panel/resin production, this device accurately monitors formaldehyde emission concentrations during production. Equipped with a high-precision electrochemical sensor, its 0-5ppm measurement range covers the OSHA-recommended action threshold (0.5ppm), while the 0.01ppm high resolution can capture trace concentration changes. Adopting differential transmission technology and optoelectronic isolation design, it effectively resists interference from workshop motor start-stop and equipment electromagnetic radiation, with a data transmission error rate of less than 0.01%, ensuring production safety and compliance.

Industrial Warehouse/Logistics Environment Monitoring

Tailored for long-distance monitoring needs in large raw material warehouses and finished product storage areas, a single bus supports networking of 32-256 devices without complex wiring. The ultra-long 2000-meter communication distance covers large warehouse spaces; paired with the Modbus-RTU protocol, it seamlessly integrates with warehouse management systems. The -40℃~+80℃ wide temperature operating range and IP protection design enable it to withstand dusty, high-humidity warehouse environments, preventing material deterioration or personnel health risks caused by excessive formaldehyde.

Industrial Waste Gas Treatment Efficiency Monitoring

Targeting the inlet/outlet monitoring needs of formaldehyde waste gas treatment equipment, it provides real-time concentration data feedback. With a fast response time of ≤35s, it accurately captures formaldehyde concentration changes before and after treatment, helping optimize treatment process parameters. It supports direct linkage with PLC and industrial configuration software: when concentrations exceed limits, it automatically triggers the waste gas treatment system to operate at an upgraded level or activates sound-light alarms. This meets industrial environmental emission regulatory requirements while retaining complete data logs for easy traceability.

Air Safety Monitoring in Electronics/Precision Manufacturing Workshops

Aligned with the strict environmental requirements of electronics factories and precision instrument production workshops, the device operates at a low power consumption of just 0.12W, with no risk of electromagnetic interference. The 10-30V DC wide-voltage power supply is compatible with industrial power distribution systems, and its wall-mounted installation saves production space. It simultaneously monitors three parameters (formaldehyde, temperature, and humidity) with ±0.5℃ temperature accuracy and ±3% RH humidity accuracy, providing dual protection for product quality stability and employee occupational health.



CH2O Sensor Specification:


Power Supply Voltage

10~30V DC

Output Signal

485

  Power Dissipation

0.12W

Temperature Measurement range

-40℃~+80℃

Humidity Measurement range

0~100%RH

Formaldehyde Measurement range

0~5ppm

Temperature Accuracy

±0.5℃(25℃)

Humidity Accuracy

±3%RH(60%RH,25℃)

Working Temperature

-20~50℃ 

Working Humidity

15~90%RH No condensation 

Pressure Limit

91~110kPa

Stability

≤7% Signal value year

Response Time

≤35s

Preheating Time

≥5min

Formaldehyde zero drift(-20~40℃)

≤±0.5ppm

Epetitiveness

≤2%

Working Life

≥24 months

Accuracy

±5%FS(@1ppm、25℃、50%RH)

Resolution Ratio

0.01ppm




Packaging:

Single gross weight: 0.600 KG

Single package size: 23X20X5 cm

 



Application: 


The High precision CH2O gas sensor also widely used for gas monitoring of Chemical production, Ward monitoring, Vegetable greenhouse, Livestock and poultry farms, Tunnel monitoring, Cold chain logistics vehicle, Cold storage monitoring, Biosafety laboratory.

 

Certifications:


We are best gas sensor manufacturer and exporter in China with more than 10 years. Our CH2O gas sensor products are certified  with of CE, ROHS.

 

 

Production Process:


 


Why choose us:


1. Strong R & D: 30+ Senior experts and highly educated personnel formed a R & D team, heavy investment, master a number of core technologies and patents.
2. Professional and effective solutions: for smart environmental protection, agriculture and other fields, to provide customized compound networking solutions.
3. Full range of products: covering the whole industry chain products from data collection to platform services to meet diverse needs.
4. Excellent quality: we have perfect quality control system, strictly quality control each production link, low defective rate. 
5. Good service: 7×24 hours fast response, Professional pre-sale, sale, after-sales team support.

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