TGS 2630
2Pages

Catalog excerpts

PRODUCT INFORMATION TGS 2630 - for the detection of Refrigerant Gases Features: * High sensitivity to A2L and A3 refrigerants * Improved selectivity * Uses simple electrical circuit * Low power consumption Applications: * Refrigerant gas leak detection in air conditioning/refrigeration systems The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductor which has low conductivity in clean air. In the presence of a detectable gas, the sensor's conductivity increases depending on the gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration. TGS 2630 has high sensitivity to low GWP (Global Warming Potential) A2Ls, "Lower Flammability Refrigerants" such as R-32 and R-1234yf, and A3s, "Higher Flammability Refrigerants" such as R-290 (propane), as well as to R-404a and R-410a which are commonly used in air conditioning and refrigeration systems. TGS2630 uses filter material in its housing to eliminate the influence of interference gases such as alcohol, resulting in highly selective response to A2L refrigerant gases. This feature makes the sensor ideal for stationary type leakage detectors which require durability and resistance against interference gas. Due to miniaturization of the sensor chip, TGS2630 requires a heater current of only 56mA and the device is housed in a standard TO-5 package. Sensitivity Characteristics: Temperature Dependency: The figure below represents typical temperature dependency characteristics. Again, the Y-axis is indicated as sensor resistance ratio (Rs/Ro), defined as follows: Rs = Sensor resistance at various concentrations of each gas at various temperatures/40%RH Ro = Sensor resistance at 5000ppm of R-32 at 20°C/40% R.H. The figure below represents typical sensitivity characteristics, all data having been gathered at standard test conditions (see reverse side of this sheet). The Y-axis is indicated as sensor resistance ratio (Rs/Ro) which is defined as follows: Rs = Sensor resistance of displayed gases at various concentrations Ro = Sensor resistance at 5000ppm of R-32 IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY RECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET GASES ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR HAS NOT BEEN SPECIFICALLY TESTED BY FIGAR

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Basic Measuring Circuit: The sensor requires two voltage inputs: heater voltage (Vh) and circuit voltage (Vc). The heater voltage (Vh) is applied to the integrated heater in order to maintain the sensing element at a specific temperature which is optimal for sensing. Circuit voltage (Vc) is applied to allow measurement of voltage (Vout[Vrl]) across a load resistor (Rl) which is connected in series with the sensor. A common power supply circuit can be used for both Vc and Vh to fulfill the sensor's electrical requirements. The value of the load resistor (Rl) should be chosen to optimize the...

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TGS 2630 2Pages

Catalog excerpts

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TGS 2630
2Pages