SENSITRON S3957R448 R448 detector. 0-2000 ppm. 4-20 mA

The SMART3G-D2 gas detector is designed to meet industrial requirements; 

the enclosure is explosion proof and can be installed in ATEX Zone 1 and, when 

equipped with dust adapter, in Zone 21. 

The sensing element is placed in the stainless steel head with a 48 mm diameter. 

The infrared sensors employed for the flammable and refrigerant gas detection are 

poison free, with high accuracy and a long lifetime. 

The gas detector has a 12-24 Vdc power supply and a standard 4-20 mA 3-wires 

output and three relays. Optionally, the SMART3G-D2 can be equipped with serial 

RS485 communication.

The aluminium enclosure has dimensions 145 x 187 x 108 mm. The enclosure has 

3 cable entries 3/4” NPT threaded. The SMART3G-D2 features a 7-segment display 

for real-time concentration visualization and Hall effect sensors for non-intrusive 

field calibration