Measuring range / Max overload | 0-25% O2 / 30% O2
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Accuracy / Resolution | +/- 0.25% O2 / 0.01
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Long term output drift | < 5% of reading per year
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Interference gases for version O2-01 | CO2, not used in the environment with CO2 > 25% (1% of CO2 will increase 0.3% of O2 output)
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Interference gases for version O2-02 | Virtually no influence from CO2, CO, H2S, NO, H2. Only influenced by NO2 (1% NO2 will increase 0.6% of O2 output)
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Working Pressure | 1013hPa ± 20%
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Working Temperature | -10 .. + 50 oC for O2-02 and -30 .. + 50 oC for O2-01
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Storage Temperature | 0 - 20 oC
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Working Humidity | 0-99%RH non-condensation for O2-02 and 5-95%, non-condensation for O2-01
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Response time | ≤15s (Sensors should be used under conditions where the air exchange is greater than 200~300ml/minute)
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Life expectancy at 20 ̊C in normal air | approx. 3 years for WS433-O2-02 and 2 years for WS433-O2-01
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Transmission distance, LOS | 400m (2-meter height)
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Antenna Type / Frequency | Internal Antenna / ISM 433Mhz, Sub-GHz technology from Texas Instrument, USA
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Battery | 01 x AA 1.5VDC, up to 10-year operation, depends on the configuration
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Certificates | CE/EMC
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Vietnam Type Approval Certification | QCVN 73:2013/BTTTT, QCVN 96:2015/BTTTT (DAVITEQ B00122019)
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Operating temperature of Electronics | -40oC..+60oC (with AA L91 Energizer)
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Housing | Poly-carbonate, IP67
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Installation method | L-type bracket SUS304 , by M4 screws or double-sided 3M tape (included)
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Dimensions & weight Product / Package | 125x30x30mm (wireless part only), < 50g (without battery) / 190x50x50mm, < 90g |