Gas Detection and Alarm Systems

Semiconductor Gas Detector PS-7

System Configuration

ps7_system

Features

  • Sensor units are already calibrated when delivered to the site. Sensor units only need zero check and operation checks after being replaced, and they are ready to monitor gas consentration.
  • Used sensor units are returned when obtaining new ones so they can be recycled.
  • Sensor units and gas flow path can be replaced without tools.
  • All functional parts are in modules for easy replacement.
  • The Cosmos assists in reliable management of the timing for sensor unit and gas flow path replacement.

Specifications

Model PS-7
Standard Type With a Pyrolyzer
Detection Principle Electrochemical cell,

Hot wire semiconductor,

Galvanic cell

Pyrolysis + Electrochemical cell
Sampling Method Extractive type (Sample flow rate: 0.5L/min, automatic control)
Sampling Tubing*1 Teflon – External diameter: 6mm, Internal diameter: 4mm, Tubing length: 20m or less
Gas Concentration

Indication

4-digit LCD (with measuring unit), 20 – step bar graph
Alarm Indication Gas alarm (1st and 2nd atage)
– Alarm: Red LED lamp flashing
LCD – ALARM1 for 1st stage, ALARM1 and ALARM2 for 2nd stage
Low flow alarm
– Clogging indication: LCD – Flow sign rotates slowly
– Alarm: Yellow LED lamp flashing
LCD – FLOW indication, Flow sign stops rotating
Sensor trouble alarm/Incorrect sennsor insertion alarm
– Alarm: Yellow LED lamp flashing
LCD – SENS. indication
Pyrolyzer wire break alarm*2
– Alarm: Yellow LED lamp flashing
LCD – CONV. indication
Eternal Output – Gas concentration analog output: 4-20 mADC (shared with the power source

negative terminal)
– Gas alarm contact (1st and 2nd stage): 1a no-voltage contact/Non-latching
– Trouble alarm contact (Open collector/Non-latching)

Application Cable 3C or 4C shielded control cable (φ8-11mm)  x 2
Operating Temperature

/ Humidity

0 to 40 °C (No sudden change)

30 to 85 %RH (No condensation)

Power Source 24 VDC ±10%
Power Consumption Approx. 7W
Dimensions W62 X H124 X D143 mm (excluding options and protrusions)
Weight Approx. 1.0kg
Installation Wall mount
Approval CE, SEMI (Semiconductor Equipment and Material Standard)

*1 Teflon is recommended. But it depends on operating conditions when the gas adsorption capacity is high, so contact us for more information. The specifications above are subject to change without prior notice.

*2 Only for the model with a pyrolyzer.

List of detectable gases (sensor unit)

Gases
Full Scale
Detection Principle
Model No.
SiH4
5 / 25ppm
Electrochemical
CDS-7
PH3
1ppm
B2H6
500ppb
AsH3
250ppb
H2Se
250ppb
Si2H6
25ppm
SiH2Cl2
25ppm
GeH4
1ppm
NH3
100ppm
HF
10ppm
PF3
10ppm
HCl
5 / 25ppm
HBr
10ppm
F2
5ppm
Cl2
5ppm
ClF3
1ppm
O3
1ppm
CO
250ppm
H2S
50ppm
NF3
100ppm
Electrochemical
with pyrilyzer
CCl4
100ppm
H2
500 / 1000ppm
Hot wire semiconductor
CHS-7
O2
25vol%
Galvanic cell
COS-7

*Please contact your representative for gases other than those listed.

Approvals

CE_logo     *Some types are excluded. Please contact us for farther information.

 

SEMI (Semiconductor Equipment and Material Standard)

Connectable Alarm Units

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For telephone inquiries, please call your nearest New Cosmos Electric office.

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