- CẢM BIẾN SIEMSENS Room VOC QPA21xx
- Mã sp: Room VOC QPA21xx
- Nhà sản xuất:Siemens / Germany
- Mã sản phẩm: Room VOC QPA21xx
- Giá: Liên hệ
- Lượt xem: 10987
- • Multisensor for CO2/VOC, temperature, and humidity-temperature • Maintenance-free infrared CO2sensing element, VOC sensing element based on a heated tin dioxide semiconductor • 24 Vac operating voltage, 0 to 10 Vdc output signals
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Description The QPA20… series room air quality sensors optimize room comfort by enabling demand-controlled ventilation. The sensors can acquire: CO2 and volatile organic compound (VOC) concentrations, relative humidity, and temperature. Models are available for CO2, CO2/VOC, CO2/T, and CO2/T/RH. Some models are available without a logo. The sensor evaluates the CO2/VOC concentrations and transforms it to a 0 to 10 Vdc linear proportional output signal. 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 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 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). Sensors with an LCD window display the following measured values: • CO2 in ppm • CO2 and VOC as a bar chart (4 bars ≈ 2V, 20 bars ≈ 10V) • Temperature in °C or °F • Relative humidity in % The wall-mounted sensors are suited for use with all systems and devices capable of acquiring and handling a 0 to 10 Vdc output signal.