美国VTI公司生产,针对致冷剂R-22检测模块,有扩散式和泵吸式两种型号,测量范围0-3000ppm OEMopticalbench Costeffective-Highquality Nondispersiveinfrared(NDIR)technology DiffusionGasCell-nomovingparts Precisiongascalibrationkitavailable Solidstatethroughout Fastwarm-up Notaffectedbywatervapor Industriallyrobust Linear0-5V 4-20mAcurrentloopoutputs 14to24VDCinputpower