Sierra Monitor Corporation 201 Folheto



 

2007 by Sierra Monitor Corporation Printed in U.S.A.

The Model 203 can be used in such typical applica-
tions as wastewater treatment plants, laboratories and
chemical plants.

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.

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

Combustible Gas

201-00

Hydrogen Sulfide

203-00

Carbon Monoxide

206-00