Features: ● High performance digital sensors and circuits, accurate measurement and temperature compensation; ● good long-term stability and reliability, fast response; ● sensor more than 15 years of life, maintenance-free; ● lightweight shell, elegant, easy installation; ● variety of output options, optional buzzer alarm function (to be customized) Applications: ● for the detection and control of the ambient air quality ● Suitable for wall-mounting or ceiling installation Technical parameters: sensor NDIR sensor Active Principle 5% FS accuracy of the gas diffusion automatic calibration function (need continuous power for more than 24 hours) Response time <10s (30cc / min, slow air flow rate) drift <± 10ppm / year display LCD backlit display (to be customized) Range 0-2000ppm 0-5000ppm mouth mouth mouth 4-20mA 0-10V output port RS485 port RS232 port 0-5V mouth comes alarm buzzer (to be customized) load ≤600Ω (current), ≥2KΩ (voltage) Power 18 ~ 30VAC / DC working environment 0 ~ 50 ℃, 0 ~ 95% RH (non-condensing) Storage Temperature -20 ~ 80 ℃ ABS shell material fire protection IP30 Certification CE: EN61000-6-3: 2007 / EN61000-6-1: 2007 Product appearance structure and wiring instructions :( Note: Do not use a fixed transmission housing shell gourds hanging hole later, to prevent short circuit board) Product Selection: JC280 carbon dioxide transmitter transmitter JCJ280 mouth Installation: Wall-type port output signal: 1 = 0 ~ 5VDC 2 = 0 ~ 10VDC 3 = 4 ~ 20mA 4 = RS485 port measurement range: 1 = 0 ~ 2000ppm 2 = other ranges (0 ~ 5000ppm) port Display: 0 = no Display 1 = LCD display