SYSTEM METHANE DETECTOR SC-CH4/*
Systemic methane sensor (methane detector) SC-CH4/* is a device intended for continuous measurement of methane
concentrations within the range 0-100 % underground and on the surface of mine in methane and/or coal dust explosion
hazard zones.
In case of version SC-CH4/W with methane high concentration sensor CWx-3 it is a measuring point for percentage
content in demethanation pipelines.
Output signal from the detectors can be, depending on the version
- digital signal FSK,
- voltage signal 0,4 ÷ 2 V or 1÷ 5 V
- frequency coded 5 ÷ 12 kHz.
During measurements the sensor can work only in one selected system, i.e. transmission standard.
Systemic methane detector SC-CH4/* operates in the stand-alone mode and can be supplied from intrinsically safe power
supply unit or intrinsically safe power supply and transmission line of gas detection system.
The sensor is also performing the function of two threshold switch-off device, allowing control of external devices via 2
(galvanically isolated) dwo-states outputs. The sensor is also fitted with one two-state input which can be used for
confirmation of switching-off an external device.
Two alarm thresholds can be set on any value within the range 0÷2 % CH4 for version SC-CH4/* and/or 30÷80 % CH4 for
version SC-CH4/W. Exceeding or decreainge of a given alarm threshold results in activation of alarm that is pulsation of red
diode and change of state of the given detectors output (or outputs).
Green LED indicates operation of the device
Systemic methane sensor (methane detector) SC-CH4/* is a device intended for continuous measurement of methane
concentrations within the range 0-100 % underground and on the surface of mine in methane and/or coal dust explosion
hazard zones.
In case of version SC-CH4/W with methane high concentration sensor CWx-3 it is a measuring point for percentage
content in demethanation pipelines.
Output signal from the detectors can be, depending on the version
- digital signal FSK,
- voltage signal 0,4 ÷ 2 V or 1÷ 5 V
- frequency coded 5 ÷ 12 kHz.
During measurements the sensor can work only in one selected system, i.e. transmission standard.
Systemic methane detector SC-CH4/* operates in the stand-alone mode and can be supplied from intrinsically safe power
supply unit or intrinsically safe power supply and transmission line of gas detection system.
The sensor is also performing the function of two threshold switch-off device, allowing control of external devices via 2
(galvanically isolated) dwo-states outputs. The sensor is also fitted with one two-state input which can be used for
confirmation of switching-off an external device.
Two alarm thresholds can be set on any value within the range 0÷2 % CH4 for version SC-CH4/* and/or 30÷80 % CH4 for
version SC-CH4/W. Exceeding or decreainge of a given alarm threshold results in activation of alarm that is pulsation of red
diode and change of state of the given detectors output (or outputs).
Green LED indicates operation of the device
