R507 Gas Detector GDR450I5

R507 Gas Detector 0-2000 PPM 4-20mA Relay, Display & Buzzer - Infrared sensor, for non classified area GDR450I5 - Tecnocontrol

R507 Gas Detector GDR450S5

R507 Gas Detector 0-1000 PPM 4-20mA Relay, Display & Buzzer - Semiconductor sensor, for non classified area GDR450S5 - Tecnocontrol

R507 Gas Detector GDR453I5

R507 Gas Detector 0-2000 PPM 4-20mA Relay, Display & Buzzer - Infrared sensor, for non classified area GDR453I5 - Tecnocontrol

R507 Gas Detector GDR453S5

R507 Gas Detector 0-1000 PPM 4-20mA Relay, Display & Buzzer - Semiconductor sensor, for non classified area GDR453S5 - Tecnocontrol