Data Sheet Gas Measuring and Alarm Systems

Data Sheet Application / Construction Product features The ExDetector HC100 series of measuring probes, used in conjunction with evaluation systems, have the following functions: ● Measurement and indication of the actual concentration of potentially explosive gases and vapours ● Monitoring and warning of these gases ● Triggering of safety measures Technical: the rise in concentration is counteracted by control actions (fans, disconnections, etc.) Organisational: visual and audible signals. A gas warning system consists of the following components: ● probe ● evaluation system ● controllable devices...

Data Sheet Operating principle Block diagram The probe electronics control the operating parameters (heater voltage) of the sensor. The sensor consists of an active and an inactive element. The inactive sensor element is connected in a Wheatstone bridge circuit with the active element and compensates for environmental effects such as variations in ambient temperature. As soon as combustible gas reaches the active sensor, the sample gas is burned. The heat produced in the reaction changes the electrical resistance value and hence the bridge signal. These small voltage signals are processed and...

Data Sheet Technical data (installation) Field interface Supply voltage (probe terminal) 18 - 32 V DC SELV / PELV max 5.5 W pre-fuse 100 mA antisurge ExDetector HC 100-T: 18 - 32 V DC SELV / PELV max 5.5 W pre-fuse 100 mA antisurge ExDetector HC 100-K: only for connection to the specified interface of the ExDetector HC 100-T Pmax-= 1.6 W Umax = 12 V DC Imax = 0.5 A DC Calibration interface Ignition protection type Ex ib IIC; only for connection to a certified intrinsically safe circuit: Ui = 13.8 V / Pi = 432 mW / Li = 0 / Ci = 0 Safety maximum voltage 1000 m depending on the cable type 1000...

Data Sheet Mechanical data

Data Sheet Instrument safety For authorised use of the HC100 in Zone 1 and 2 hazardous areas, compliance with the following standard ensures the highest instrument safety: ● EN 50270 (product standard) Electromagnetic compatibility of electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen EC-Type-Examination Directive 2014/34/EU - Housing/electronics (ExDetector HC 100-M / -T): II 2G Ex de [ib] IIC T6 PTB 00 ATEX 1075 - Housing (ExDetector HC 100-K): II 2G Ex de IIC T6 PTB 00 ATEX 1075 - Sensor: II 2G / Ex d IIC T4 for -20°C < TA < +80°C T6 for -20°C...