H2S leak detection alarm RS485 4~20mA

  • 20-49 Pieces
  • 50-99 Pieces
  • >=100 Pieces
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Shipping fee:
Depends on the order quantity.
Lead Time:
3 day(s) after payment received
Customized logo (Min. Order: 100 Pieces)
Customized packaging (Min. Order: 100 Pieces)


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Quick Details
Place of Origin:
Shandong, China
Brand Name:
Model Number:
Gas Sensor
Inductance Sensor
Digital Sensor
Product name:
H2S leak detection alarm RS485 4~20mA
H2S gas sensor
2 Years
H2S leak detection
Output signal:
Detection accuracy:
±10% FS
N2S range:
DC 10~30V

Packaging & Delivery

Selling Units:
Single item
Single package size: 
11X8.5X4.4 cm
Single gross weight:
0.23 kg
Lead Time :
Quantity(Piece) 1 - 200 201 - 500 >500
Est. Time(days) 3 7 To be negotiated

H2S leak detection alarm RS485 4~20mA




Product introduction
Hydrogen sulfide is a flammable hazardous chemical. It can form an explosive mixture when mixed with air. It can cause fire and explosion in case of open fire and high heat. At the same time, hydrogen sulfide is an indispensable raw material in the chemical industry, such as the synthesis of phosphors and the manufacture of photoconductors. Hydrogen sulfide is also a highly toxic gas, which can cause human olfactory paralysis. After inhalation, a small amount of high-concentration hydrogen sulfide can be fatal in a short time. Low concentrations of hydrogen sulfide have an effect on the eye, respiratory system and central nervous system. Therefore, for the industry using hydrogen sulfide, the detector for detecting the concentration of hydrogen sulfide is indispensable. Our company has independently developed the hydrogen sulfide temperature and humidity transmitter for the market demand.

This product is a constant potential electrolytic hydrogen sulfide (H2S) sensor with low power consumption, high precision, high sensitivity, wide linear range, strong anti-interference ability, excellent repeatability and stability. This product is widely used in the detection of hydrogen sulfide in industrial, mining, environmental protection and animal husbandry. The product adopts 485 communication standard MODBUS-RTU communication protocol, communication address and baud rate can be set. The enclosure rating is high and can be adapted to different environmental monitoring.

Technical Parameters

Power supply

DC 10~30V

Average power consumption


Temperature measurement range


Temperature accuracy


Humidity measurement range

0 ~100%RH

Humidity accuracy


N2S range


O3 Discriminate


Operating temperature


Working humidity


Data and new time


Stable (monthly)


Detection accuracy

±10% FS

output signal



Response time






1. High-sensitivity gas detection probe with stable signal and accurate measurement of hydrogen sulfide concentration (PPM) with high accuracy.

2. Wide measurement range, 0-100 maximum range of 500ppm.
3. 485 communication, standard ModBus-RTU communication protocol, communication address and baud rate can be set, the farthest communication distance is 2000 meters.

4. The product adopts wall-mounted waterproof case, which is easy to install and has high protection level.



Q: Are you the final manufacturer?
A: Yes, We are Tranmitter manufacturer and exporter in china over 10 years experience with CE, ROHS, FCC, ISO and 11patent.


Q: Do you offer the OEM service?
A: Yes, we can offer OEM service and design the shell and logo for you.


Q: Do you offer free samples?
A: Sorry , we do not offer free samples. After you bulk order, we will deduct the sample fee from second order.


Q: What payment ways do you accept?
A: You can pay us by T/T , PayPal , and West Union .


Q: What is your delivery time?
A: It is in 3-5 working days since the payment confirmed. If your order is over 3000pcs, we need 10 days.


Q: How is your quality assurance service?
A: 24 months quality guarantee.


Q: Could we make a visit to your factory?
A: Yes, you are welcomed .