Most coolants and refrigerants are toxic, many are flammable and others also have a high GWP (= global warming potential), i.e. they are extremely harmful to the climate. A leak in the coolant line is usually quickly noticed, the cooling function is then no longer given, thermometers help better than coolant warning devices. But the leaked coolant, which evaporates quickly due to its properties, should not be inhaled under any circumstances. Exactly for this there is the refrigerant sensor technology with the socket warning devices GX-K1 (int. sensor) and GX-K2 (ext. sensor). These are therefore warning devices designed primarily for the protection of human health. According to their purpose, they are set to be very sensitive and also have cross-sensitivities to some combustible gases. For example, they can be easily tested for function with the pressure-reduced gas from a commercial lighter, because R-290 is nothing more than propane, which is often used as a refrigerant in heat pumps. R-22, R-32, R-404a, R-410a, R-1234yf and many other HFCs can be detected with the GX-K1 and K2, with R-32 defined as the target gas. The sensor also has cross sensitivity to methane, butane, propane (R-290), ethanol, hydrogen and other hydrocarbons.
Performance features
- audiovisual warning (LED and loud piezo sound)
- detects a wide range of fluorinated refrigerants (HFCs)
- R-22, R-32, R-404a, R-410a, R-1234yf and many other HFCs
- Cross-sensitivity to methane, butane, propane (R-290), ethanol, hydrogen, etc.
- ideal for the operation of private air conditioners
- very simple sensor test with gas from lighter
- Sensor lifetime up to approx. 5 years, external sensor can be replaced by the user himself
- cost-effective exchange possible with internal sensor from Elektrotechnik Schabus
Technical data
| Operating voltage: | 230 (+/-10%) V AC / 50-60 Hz |
| Power consumption: | up to approx. 3 VA, depending on operating condition |
| Protection class: | IP 20 |
| Sound pressure buzzer: | > 80 dB(A)@1m (main alarm) |
| LED indicators: | green flashing: Preheating phase approx. 3 minutes |
| green illuminated: operation / monitoring | |
| yellow flashing: malfunction, cable break, etc. | |
| red flashing: pre-alarm / main alarm | |
| Sensor type: | catalytic |
| Functional area sensor: | -10 °C / +50 °C |
| Storage temperature sensor: | -20 °C / +70 °C |
| Humidity (ambient): | 5-90 % RH (non-condensing) |
| Sensor lifetime: | rd. 5 years |
| Dimensions (H x W x D): | 118 x 60 x 44 mm |
| Cable length: | 2.5 m, not extendable, GX-K2 only |
| Cable Ø: | 3.5 mm, GX-K2 only |
| Dimensions sensor (H x W x D): | 52 x 27 x 29 mm, GX-K2 only |
| Sensitivity to: | R-22, R-32, R-404a, R-410a, R-1234yf, other HFCs |
| Cross-sensitivities on: | Methane, butane, propane (R-290), ethanol, hydrogen |
| and other hydrocarbons | |
| No sensitivity for: | Carbon monoxide CO |
| Pre-alarm: | 100 - 10,000 ppm, depending on type of refrigerant |
| 3% LEL for flammable gases | |
| Main alarm: | e.g. R-32 from 1000 ppm @ 20°C environment |
| 10 - 20% LEL, typically 12% LEL |
WEEE NO.: EN91394868
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