The SMART 3G-D3 Gas Detector with Electrochemical sensor is designed to meet industrial requirements; the enclosure is explosion-proof and can be installed in ATEX Zone 2 and, when equipped with a dust adapter, in Zone 22.

The sensing element is placed in the stainless steel head with a 47.5 mm diameter. Due to the optimal performance in these applications, the electrochemical cell detects toxic gas.

The gas detector has a 12-24 Vdc power supply, a standard 4-20 mA 3-wires output, and three relays. Optionally, the SMART3G-D3 can be equipped with serial RS485 communication.

The enclosure has dimensions 106 x 160 x 81 mm; on the upper side, there’s a M20 cable gland. The SMART3G-D3 features a 7-segment display for real-time concentration visualization and Hall effect sensors for non-intrusive field calibration.

SMART3G-D3 is SIL2 hardware and SIL3 software; with a redundant system, the hardware is SIL3.

Order Information

Sensor Part Number	Description
SMART3G-D3 – TOXIC GAS (Electrochemical cell)
S2642O2	OXYGEN (O2) detector, 0-25% Vol., 4-20 mA
S2162CO	CARBON MONOXIDE (CO) detector, 0-500 ppm, 4-20 mA
S3226AM	AMMONIA (NH3) detector, 0-100 ppm, 4-20 mA
S2164AM	AMMONIA (NH3) detector, 0-200 ppm, 4-20 mA
S2166AM	AMMONIA (NH3) detector, 0-1000 ppm, 4-20 mA
S3230AM	AMMONIA (NH3) detector, 0-5000 ppm, 4-20 mA
S2168HS	HYDROGEN SULPHIDE (H2S) detector, 0-50 ppm, 4-20 mA
S2176NO	NITRIC OXIDE (NO) detector, 0-100 ppm, 4-20 mA
S3594H2	HYDROGEN (H2) detector, 0-2000 ppm, 4-20 mA
S4548H2	HYDROGEN (H2) detector, 0-3000 ppm, 4-20 mA
ACCESSORIES
STS/CSW+	Calibration software for SMART3G, SMART3NC & SMART3R detectors including USB key, USB/RS485 converter and STS/IDI card. Allows alarm threshold adjustment, measuring range setup, and Zero/Span/4-20 mA calibration via user-friendly interface.
STS/IDI	Plug-in interface for RS485 serial communication suitable for SMART3G
STGD/AD3	Adapter for all sensor heads (except S2096__ & S2097__) to upgrade protection from G to GD