Sierra Monitor Corporation 201 Carbon Monoxide Alarm User Manual


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2007 by Sierra Monitor Corporation Printed in U.S.A.
Model 203 - Hydrogen Sulfide
The Model 203 can be used in such typical applica-
tions as wastewater treatment plants, laboratories and
chemical plants.
Model 206 - Carbon Monoxide
The Model 206 Carbon Monoxide Gas Sensor Module
can be used to provide an early warning of Carbon
Monoxide accumulation in tanks, laboratories, chemi-
cal plants, parking garages, vehicle test facilities and
more.
SPECIFICATIONS
SENSOR TYPE: Solid-State Metal Oxide Semiconductor
RANGE: (at 50% relative humidity)
Model 201 300 - 2,000 ppm Hydrogen
500 - 10,000 ppm Methane
Model 203 10-50 ppm Hydrogen Sulfide (H
2
S)
Model 206 50 - 500 ppm Carbon Monoxide (CO)
RESPONSE TIME:
Model 201 Less than 30 seconds
Model 203 For 50 ppm alarm, if 50 ppm H2S is present:
1-4 minutes, if >250ppm H2S is present:
30-90 seconds
Model 206 Less than 30 seconds
PERIODIC
MAINTENANCE: None, other than routine calibration
OPERATING
TEMPERATURE
RANGE: -4°F TO 158°F
(-20°C TO 70°C)
INPUT: 9 - 24 VDC (
+ 1V), 250 mA
OUTPUT: 0.5 amp dry contact, 100 VDC, 130 VAC
Nominal 5 volts DC (TTL), source 25mA.
SAFE and ALARM signals.
INDICATORS: Internal LED for calibration
ENCLOSURE: Class I, Division 1, Groups C, D
ENCLOSURE Cast aluminum for protection against
MATERIAL: galvanic corrosion
SIZE: 6.75 x 4.0 x 3.5 in
(17.1 x 10.2 x 6.0 cm)
WEIGHT: 24 oz (678 g)
APPROVAL: UL 60950
Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-6611 800-727-4377 FAX: (408) 262-9042
Visit our Web site at: www.sierramonitor.com E-Mail: sierra@sierramonitor.com
Rev. B 8/23/07
ORDERING INFORMATION
Combustible Gas 201-00
Hydrogen Sulfide 203-00
Carbon Monoxide 206-00
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