SEMITEC’s refrigerant gas sensor module is thermally conductive gas detection sensor that is used the unique ultra-compact and highly sensitive thin film thermistor element.
It can be used to detect leakage of microflammable refrigerant gas R32 which is mainly used in air conditioning equipment.
Because of the heat conduction type, unlike general gas detection sensors, there is no need for replacement and it can be used continuously even after exposure to leakage gas, which can be expected to reduce maintenance costs.
In addition to R32, R454B, R744, hydrogen and others also can be detected.
Features
・No Replacement：Even when exposed to 100%LFL※2 flammable gas, replacement is not required. It can reduce maintenance costs.
・Long life：Stable performance can be maintained over a long period of time because there is no poisoning deterioration due to miscellaneous gases.
・Environmental disturbance-resistant：Resilient to environmental disturbances such as humidity, atmospheric pressure, and wind, and stable performance in various environments.
・Versatile output support：Open collector output and UART support enable various applications such as monitoring, alerting and fault detection.
Poisoning Degradation Stability
Application
・Refrigerant gas leakage detection of commercial air conditioning equipment
・Refrigerant gas leak detection in refrigeration equipment
・Detection of combustible gas concentration
Specifications and Performance※1
・IEC60335-2-40 Ed.7(to be compliant）
・UL60335-2-40 Ed.4(to be compliant）
| Item |
Specifications (R32 only) |
| Measurement concentration range |
0ppm～144,000ppm(100%LFL※2) |
| Gas leak detection range |
Normal:0ppm to < 10,080ppm(7%LFL※2)
Warning:10,080ppm to 36,000ppm(25%LFL※2) or more |
| Initial stabilization time |
Time required to stabilize after turning on the power within 60 seconds |
| Response speed※3 |
Alarm within 15 seconds when exposed to 36,000ppm (25%LFL※2) R-32 refrigerant |
| Error detection※3 |
Self-inspection for failure once an hour |
| Power consumption |
< 200mW (at 25°C) atmospheric pressure |
| Current consumption |
40mA or less (at 25°C) atmospheric pressure |
| Operating temperature and humidity range |
Temperature -25~60°C
Humidity 30~95%RH
Absolute humidity 48.5 g/㎥ or less, no condensation |
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※1 These are tentative specifications for the developed product and are subject to change without notice.
※2 LFL is the lower flammability limit.
※3 Compliance with IEC60335-2-40 Ed.7, UL60335-2-40 Ed.4.
