CẢM BIẾN SIEMENS Room CO2 QPA20xx
- CẢM BIẾN SIEMENS Room CO2 QPA20xx
- Mã sp: Room CO2 QPA20xx
- Nhà sản xuất:Siemens / Germany
- Mã sản phẩm: Room CO2 QPA20xx
- Giá: Liên hệ
- Lượt xem: 11084
- The QPA20xx Series Indoor Air Quality Sensors optimize room comfort by enabling demand-controlled ventilation. Models are available that measure CO2, CO2 and temperature, or CO2, temperature and relative humidity. For models with humidity, a capacitive humidity sensing element changes capacitance as a function of the relative humidity. An electronic measuring circuit converts the humidity signal to a continuous 0 to 10 Vdc or 0 to 5 Vdc signal that corresponds to a relative humidity range of 0 to 100%. For models with temperature, the sensor acquires room temperature with a sensing element that changes electrical resistance as a function of the temperature. The resistance is converted to an active 0 to 10 Vdc or 0 to 5 Vdc output signal that corresponds to a temperature range of 32°F to 122°F (0°C to 50°C) or -31°F to 95°F (-35°C to 35°C). The QPA2002 models measure both CO2 and volatile organic compounds (VOC) for optimized indoor air quality. A single 0 to 10V or 0 to 5V (selectable) output signal is automatically adjusted to reflect the higher of the two values. This enables the combination CO2 + VOC sensor to be easily substituted for a CO2 sensor in any demand control ventilation control system. These wall-mounted sensors are designed for use with all systems and devices capable of acquiring and handling a 0 to 10 Vdc or 0 to 5 Vdc output signal.
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· Non-Dispersive Infrared (NDIR) sensing technology is ideal for use in facilities that are occupied 24/7. · Combination units enable a single sensor to take the place of up to three individual sensors. · Maintenance-free infrared CO2 sensing element never requires re-calibration. · 24 Vac or 15 to 35 Vdc operating voltage, 0 to 10 Vdc or 0 to 5 Vdc output signals (field selectable).
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