
Model SA-220
Industrial Gas Detector
The SA-220 is an advanced single gas detection transmitter designed for use with the full range of SA2 smart sensor modules. The diffusion-based detector identifies gas type, sensitivity range, and serial number at startup and guides the user through zero and span calibration with a full-color display. It supports configurable sleep modes, GPS entry details, 10 event logs, optional relays, an intrinsically safe sensor interface, and a choice of ABS plastic, aluminum, or stainless steel housings.

Specifications1
1 Specifications subject to change without notice.
Features
Universal Transmitter
- Full-color digital display
- Non-intrusive magnetic interface
- Plug-and-play SA2 smart sensor modules across a wide gas catalog
- Auto-configuration with the SCX control system
- 10 Event Logs
- Bluetooth connect to OpCheck® application for Android and iOS handhelds
- Optional relay output: 3 alarm levels and fault - 5 V, 2 A dry contact
Integration
- Serial Modbus RTU (single address) & analog 4-20 mA DC per active channel
- Power input: 10-30 VDC
- Power consumption: 0.75 W to 2 W (smart sensor dependent)
Environmental & Enclosure
- Temperature range: -40 °C to +60 °C (-40 °F to +140 °F)
- Humidity: 0-99% RH non-condensing
- Ingress protection: NEMA 4X, IP66
Area Classification
- Designed to Class I, Div 1, Groups A, B, C, D standards for stainless steel and aluminum configurations
- Global certifications pending: CSA, UL, ATEX, and IECEx
Applications
- Fixed-point monitoring across industrial facilities
- Standalone installations or networked to SCX
- Hazardous and harsh environments
- Integration with Modbus & 4-20 mA hosts and PLCs
