Page 400 - Praxair - Specialty Gases and Equipment Reference Guide

Gas Detection Systems

Gas Sensor/Transmitter

S2 Model Specifications – Explosion Proof
LEL LEL H 2 PPM O 2 H 2 S CO CO 2 CH 4 HC
General H 2 Hydrogen Oxygen Hydrogen Carbon Carbon Methane Hydro-
Purpose Specific Sulfide Monoxide Dioxide carbons
Sensors
Type Catalytic Catalytic Metal oxide Galvanic cell Electro- Electro- Infrared Infrared Infrared
semi- chemical chemical
conductor
Measuring 0-100% LEL 0-100% LEL 0-1000 ppm 0-25% vol. 0-100 ppm 0-300 ppm 0-5000 ppm 0-100% LEL 0-100%
Range (H 2 Specific) 0-2000 ppm 0-5% vol. LEL
0-50% vol.
0-100% vol.
Lower 2% of 2% of 2% of 0.1% vol. 2% of 2% of 2% of 2% of 2% of
Detectable full scale full scale full scale full scale full scale full scale full scale full scale
Limit (LDL)
Max Current 200 mA (power wires) 20 mA max, 20 mA max, 20 mA max, 60 mA (power wires)
Draw (24VDC) 25 mA (signal wires) 3 wires 2 wires 2 wires 2 wires 25 mA (signal wires) 3 wires
Response 30 Seconds 20 Seconds 45 Seconds 20 Seconds 45 Seconds 30 Seconds 30 Seconds 30 Seconds 30 Seconds
Time (T-90)
Accuracy ± 5% of ± 5% of ± 10% of ± 0.5% O 2 ± 5% of ± 5% of ± 5% of ± 5% of ± 5% of
(whichever reading or reading or reading or reading reading reading or reading or reading or
is greater) ± 2% LEL ± 2% LEL ± 5% of ± 2 ppm ± 5 ppm ± 2% of ± 2% of ± 2% of
full scale H 2 S CO full scale full scale full scale
Life 2 to 3 years 3 to 5 years 5 years plus 2 to 3 years 2 to 3 years 2 to 3 years 5 years plus 5 years plus 5 years plus
Expectancy with normal with normal with normal with normal with normal with normal with normal with normal with normal
exposure to service service service service service service service service
flammable
gas
Operating Environment
Location Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. Section E – Gas Handling Equipment
Temperature -40 °F to 167 °F -40 °F to 167 °F -40 °F to 167 °F -4 °F to 113 °F -40 °F to 104 °F 23 °F to 104 °F -4 °F to 122 °F -4 °F to 122 °F -4 °F to 122 °F
-40 °C to 75 °C -40 °C to 75 °C -40 °C to 75 °C -20 °C to 45 °C -40 °C to 40 °C -5 °C to 40 °C -20 °C to 50 °C -20 °C to 50 °C -20 °C to 50 °C
Humidity 0 - 99% RH, non condensing
Housing
Housing J Box Cast aluminum explosion proof, optional stainless steel J-box available
Sensor Stainless steel explosion proof
Controls
Zero Sets transmitter output to 4 mA with zero output from sensor
Span Sets transmitter output to proper level when span gas is applied
Output 4 - 20 mA signal
Operating 11 VDC to 11 VDC to 19 VDC to 19-30VDC (250 OHMS impedance max) 11 VDC to 11 VDC to 11 VDC to
Voltage 30 VDC 30 VDC 30 VDC 30 VDC 30 VDC 30 VDC
Approvals UL UL UL CSA NRTL CSA NRTL CSA NRTL C UL US C UL US C UL US
C CSA US C CSA US
Controllers Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410, and 800, also PLC and DCS systems
Warranty One year materials and workmanship

Ordering Information
Description Part Number Description Part Number
LEL General Purpose (UL approved) PRS65-2405RK CO Carbon Monoxide PRS65-2336RK
LEL General Purpose (C CSA US approved) PRS65-2405RK-05 CO 2 Carbon Dioxide (0 - 5000 ppm) PRS65-2396RK-02
LEL H 2 Specific (UL approved) PRS65-2451RK CO 2 Carbon Dioxide (0 - 5.0% volume) PRS65-2396RK-03
LEL H 2 Specific (C CSA US approved) PRS65-2451RK-05 CO 2 Carbon Dioxide (0 - 50% volume) PRS65-2396RK-05
H 2 PPM Hydrogen (0-1000 ppm) PRS65-2442RK-1000 CO 2 Carbon Dioxide (0 - 100% volume) PRS65-2396RK-10
H 2 PPM Hydrogen (0-2000 ppm) PRS65-2442RK-2000 CH 4 Methane PRS65-2394RK-CH4
O 2 Oxygen PRS65-2322RK HC Hydrocarbons PRS65-2394RK-HC
H 2 S Hydrogen Sulfide PRS65-2331RK

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