Subtronics [india] manufactures microprocessor-based gas monitors with three setpoints and three separate relays. These gas monitors are available with salient features like four keys for simple programming, calibration and operation; two independent displays for setpoint and process variable setpoint in 0.3 differentiate; 3 mm red leds displays for displaying setpoints and status of control/alarm/display relays; and menu-driven operation with user-understandable prompts. These gas monitors are provided with an external data lockout keys for protecting programmed data; three setpoints with individual hysteresis with separate relays for control or alarm programming; relay on below or above setpoint and as deviation from main setpoint. The monitors are available with technical specifications like provision of online configuration without opening units; controller units operated on 240 v ac or 110 v ac; 4-20 ma output facility calibration; and front panel keys for adjusting zero and span digital calibration. These gas monitors are applicable in plants with combination of ministry of labour [govt of india] approved self-calibrated cmri and dgfas & li flameproof and weatherproof gas detectors for long life span.
