Infared gas sensors: Guardian Range ® KEY FEATURES • Low Voltage DC Supply • Easier transfer of data via on board RS232 interface • Concentration readings of a wide range of pressures (pressure compensated) • Password protection to prevent accidental or deliberate change of settings • Improved screen display provides more information • Graphical display of historic readings • Easier to set up using on-screen menus • Optional Ethernet interface • Digital Alarm set points • Relay outputs for control of external devices A NEW GENERATION OF GAS SENSORS The Guardian® NG DC infrared gas monitor offers nearanalyser quality continuous sampling, measurement and display of CO2 concentrations between 0 – 3000ppm to 0-100% by volume from low voltage DC supplies in the range of 18-30V. With tens of thousands of our monitors supporting critical processes in industries throughout the world we have an enviable reputation for reliability, accuracy, long-term stability plus low maintenance requirements. This can be attributed to our proprietary infrared sensor technology Suitable for a wide variety of applications, these wallmounted monitors can detect CO2 from sampling points up to 30 metres away, using the integral sampling system. Our Guardian® NG instruments are easy to install stand-alone products that require minimum set up. The Guardian® NG is supplied with LCD display and digital alarm set-point controls, housed in a robust plastic IP54 rated enclosure to prevent the ingress of

EDINBURGH SENSORS Infared gas sensors: Gu ardian Range GUARDIAN® NG DC For CO2, CH4, & CO Accuracy ±2% of full scale** Humidity Measurements are unaffected by 0-95% relative humidity, non-condensing Power Consumption 15W typical (25W Max) Response Time T90 <30 seconds from sample inlet 4-20mA / 0-20mA analogue output 11V guaranteed drive capability Outputs Alarm 1 relay, Alarm 2 relay and Fault relay SPCO (single pole change-over) Voltage free contacts rating 8A at 250V AC (resistive load) 8A at 24V DC (resistive load) Enclosure rating IP54 The Guardian NG can also be supplied...