Model SA-2N4

Gas Detection System


Model SA-2N4 gas detection systems are designed to detect and monitor toxic, oxygen and combustible gases in ambient air. Sampling is via diffusion. The design features compatibility with a full range of conventional sensor technologies; catalytic pellisitors, electrochemical sensors, photo ionization detectors and non-dispersive infrared. Specific gas type is determined by installing one or two selected Model SA1 smart sensor modules. Each sensor module stores gas type, range of sensitivity and the last zero and span calibration data points.
All electronics are contained within a NEMA 4X weatherproof enclosure suitable for installation in both indoor and outdoor locations. Model SA-2N4 gas detectors feature non-intrusive calibration using a small magnet. The color graphic display provides simple and intuitive user interface with real time readings and full script service instructions. Device status is readily determined by screen color; green normal – no alarm condition, amber alarm level 1, red alarm level 2 and blue indicates a fault condition.

Standard and Optional Features

Diffusion Dual Sensor Module

Model SA-2N4 incorporates a field serviceable dual sensor module allowing for easy autoconfiguration with interchangeable SA1 smart sensors.

Model SA1 Smart Sensor Modules

Model SA1 smart sensor modules are designed to detect and monitor various gases in ambient air. The modules consist of a target specific gas detection sensor and a microprocessor-based signal conditioning circuit. Both are housed in a metallic enclosure fitted with gold plated connecting pins. The “Smart Sensor Module” is factory programmed for a specific gas and range of sensitivity. On power up the gas type, measurement range and previous zero and span calibration data points are read by the control system facilitating a fully automated startup. The modules can be used with any of Safeguard Analytics gas detection systems and control transmitters.