Module Introduction:
The integrated 4-20mA output product is a toxic gas detection module that integrates sensors and transmission modules. The product design is produced in accordance with national explosion-proof standards. The measuring element adopts advanced imported gas sensors, which have the characteristics of accurate measurement, long service life, high stability, and strong anti-interference ability; This module circuit design has been designed to prevent circuit reverse connection, high voltage, and excessive current, while considering lightning protection in product design.
Product characteristics
Main features of the module:
1. Choose advanced imported electrochemical sensors with long service life;
2. Choose high-precision operational amplifiers and power ICs with stable performance, sensitivity, and reliability;
3. Can accurately detect low or high concentrations of toxic gases;
4. Strong anti-interference ability in product design;
5. Product design includes over range protection, reverse polarity protection, and lightning protection;
6. Product design with low power consumption, standard 4-20mA two-wire signal output;
7. Connection interfaces for module sensors: pump suction, diffusion, flange, flange thread;
8. Working voltage: 8-36VDC;
Product Parameters
| Module model: |
YF-GK-V3 |
| Gas detection: |
Toxic gases (CO H2S SO2 CH2O H2O2, etc.) |
| Detection principle |
Principles of electrochemistry |
| Sampling method |
Diffuse pump suction flange type, flange thread type |
| response time |
30 S to 40 S (sensor response speed) |
| Module detection accuracy |
≤± 3% FS (actual concentration, higher accuracy depends on specific sensor) |
| Module repeatability |
≤±2% |
| Modular line error |
≤±2% |
| Module zero drift |
≤± 2% (F.S/year) |
| Module operating temperature |
-40~80ºC |
| Module environment humidity |
0-95% RH (no condensation) |
| Sensor operating temperature |
-20ºC-50ºC |
| Sensor working humidity |
0-90% RH (no condensation) |
| signal output |
4-20mA two-wire system, RS-485 output |
| transmission distance |
100 meters |
| working voltage |
DC 12-36 V |
| maximum power |
≤0.8W |
| Product size |
80*48mm |
| Explosion proof grade |
Intrinsic safety type |
| Connecting cables |
RVVP3×1.5mm2 |
Applicable scenarios
Module application field
Petroleum, petrochemical, metallurgical, chemical, power, telecommunications, gas, mining, pharmaceuticals, municipal sewage treatment, indoor environment, atmospheric environmental protection, transportation equipment, transportation, tunnel safety, underground parking lots.
Gas type
Table 1: Comparison Table of Measurement Type Number and Name (Gas Part, Customization for Other Gases)
| Serial number |
Chemical formula |
Serial number |
Chemical formula |
| 01 |
CO |
12 |
F2 |
| 02 |
H2S |
13 |
HF |
| 03 |
O2 |
14 |
HCL |
| 04 |
NO2 |
15 |
HBr |
| 05 |
SO2 |
16 |
COCl2 |
| 06 |
Cl2 |
17 |
SiH4 |
| 07 |
NH3 |
18 |
ClO2 |
| 08 |
H2 |
19 |
BR2 |
| 09 |
PH3 |
|
|
| 10 |
CH2O |
|
|
| 11 |
O3 |
|
|
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