System Methane Detector SC-CH4

Contact

Product Code

SC-CH4/*2*

Brief

Origin: Poland. Measuring ranges: 0 ÷ 100 %CH4

Promotion

Contact: +84 904544588

Contact

Catalogue

Systemic methane detector SC-CH4/*2* is a device intended for continuous measurement of methane concentrations within ranges of 0-5 % or 0-100 % of CH4 in 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 measuring gas 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;

- Current signal 4 ÷ 20 mA(passive);

- Frequency coded 5 ÷ 12 kHz.

Detector operates in one of following transmission configuration (depending on version):

- FSK with voltage signal;

- Frequency coded with voltage signal;

- FSK with passive current signal;

- Frequency coded with passive current signal.

Systemic methane detector SC-CH4/*2* operate in the stand-alone mode and then is supplied from intrinsically safe power supply unit or intrinsically safe power supply and transmission line of gas detection system.

The detector is also performing the function of two thresholds switch-off device, allowing control of external devices via 2 (galvanically isolated) two-state outputs. The detector is also fitted with 2 two-state inputs 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 SC-CH4/*2* version: n, s, IR and/or 30÷80 % CH4 for version SC-CH4/W. Exceeding of a given alarm threshold results in activation of alarm as a red diode (SC-CH4/*2L) or buzzer (SC-CH4/*2S) and change of state of the given detector's output (s).

Green LED on the front informs about proper operation of the device.

Power supply	From intrinsically safe telemetric line Ui=60 V, Ii = 150 mA
Power supply	From intrinsically safe power supply unit U= 15 V; I = approx. 35 mA
Versions * i - current output (passive) S - buzzer alarm L - LED alarm Si - buzzer and current output or outputs Li - LED signaling device and current output or outputs	SC-CH4/n2* - Basic version
	SC-CH4/s2* - Special version (modified software, different measurement range)
	SC-CH4/W - Version for connection of high concentrations of methane detector CWx-3
	SC-CH4/IR2* - Version with Infrared sensor
Output signal	Frequency 5 ÷ 12 kHz
	Digital FSK
	Voltage 0,4 ÷ 2 V or 1 ÷ 5 V
	Current 4 ÷ 20 mA (passive)
Principle of operation – Diffusion penetration of gas to the cylinder head	Catalytic measurement 0 ÷ 5 % CH4
	Conductivity measurement 5 ÷ 100 % CH4 or 0 ÷ 100 % CH4
	Measurement on the principle of detecting infrared radiation from 0 ÷ 100 % CH4
Measuring ranges	0 ÷ 5 % and 5 ÷ 100 % CH4 (version n and s)
	0 ÷ 100 %CH4 (version W)
	0 ÷ 100 %CH4 (version IR)
Accuracy for version SC-CH4/n2* and SC-CH4/s2*	±0,1 % CH4 (range 0 ÷ 2,5 % CH4)
	±0,3 % CH4 (range 2,5 ÷ 5 % CH4)
	±3 % CH4 (range 5 ÷ 100 % CH4)
Accuracy for version SC-CH4/W	±3 % CH4 (range 0 ÷ 60 % CH4)
Accuracy for version SC-CH4/W	±5 % of measured value in range 60 ÷ 100 % CH
Accuracy for version SC-CH4/IR	±0,1 % CH4 (range 0 ÷ 3 % CH4)
Accuracy for version SC-CH4/IR	±5 % of measured value in range 3 ÷ 100 % CH4
Resolution	±0,01 % CH4 (range 0 ÷ 5 % CH4)
Resolution	±0,1 % CH4 (range 5 ÷ 100% CH4)
Measurement method	Continuous
Response time T90	≤ 3,5 sec. pellistor senor
Response time T90	≤ 10 sec. infrared sensor
Air flow rate	Up to 10 m/s
Humidity	< 95 % without condensation
Dustiness of the air	max 1000 mg/m3
Impacts and vibrations	Not permissible
Ambient temperature and temperature of measured gas mixture	-20 ≤ Tamb ≤ 50 oC
Protection level	I M1 Ex ia I Ma
Delay of alarm threshold relays AL1, AL2	< 1 sec.
IP rating	IP54
Dimensions	175 × 80 × 90 mm
Weight	0,9 kg

update_content