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FREON GAS SENSOR MODULE
User Guide for SRAQ-G021
Product Description
The SRAQ-G021 gas sensor module detects the presence and concentration of various refrigerants including R11, R22, R113, R134, R409A, R410A
etc. Integrated circuitry produces a non-linear voltage signal corresponding to the freon gas concentration. With a detection range of 10 to 1000 ppm,
the SQAR-G021 is a low-cost, long service life sensor module well suited for use in freon gas detection devices for commercial and residential
applications.
Features
Features MQ139 sensing element
Highly sensitivity to freon
Indication light
Analog and TTL level outputs
Fast response
4 pin male header
Applications
Freon gas detectors
Gas leakage
Refrigeration units
Air conditioning systems
Thank you for choosing L-com product. To ensure safe, accurate performance and product longevity, please take a moment to familiarize yourself
with this manual before powering the device. Please keep it handy for future reference. In case of any questions regarding the installation or use of
product, please call us at 800.341.5266.
Reach out to us at customerservice@l-com.com and visit our website at www.l-com.com
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Summary of Contents for Infinite L-Com SRAQ-G021
- Page 1 FREON GAS SENSOR MODULE User Guide for SRAQ-G021 Product Description The SRAQ-G021 gas sensor module detects the presence and concentration of various refrigerants including R11, R22, R113, R134, R409A, R410A etc. Integrated circuitry produces a non-linear voltage signal corresponding to the freon gas concentration. With a detection range of 10 to 1000 ppm, the SQAR-G021 is a low-cost, long service life sensor module well suited for use in freon gas detection devices for commercial and residential applications.
- Page 2 Technical Parameters Working Voltage 5 VDC ± 0.2 V Working Current <150 mA Gas Detection Freon Detection Concentration 10 1000 PPM Response Time >3 sec Recovery Time ≤30 sec Aout (Analog signal) 0 5 V, Non-linear Output Mode Dout (Level signal) Low level: 0V;...
- Page 3 Notes Confirm the polarity and the voltage of the power supply before powering ON the sensor. The analog output of this module is non-linear. When connect to microcontroller, it should be connected to ADC interface of the microcontroller. The relationship between the resistance ratio and the concentration is a logarithmic relationship. For more info on typical sensitivity curve, check MQ139 Probe on internet.
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