Sierra Monitor Hydrogen Sulfide User Manual

The Model 200X Series are compact, solid­state, fixed-installation single alarm monitors
designed for continuous area monitoring of
Combustible Gas, Hydrogen Sulfide, or Car­bon Monoxide.

Model 200X Series

Gas Sensor Monitors

Model 2001 - Combustible Gas

Model 2003 - Hydrogen Sulfide

Model 2006 - Carbon Monoxide

The Model 200X Series consists of three separate gas
monitors, Model 2001 for Combustibles Model 2003
Hydrogen Sulfide and Model 2006 for Carbon Monoxide.
A red LED (light-emitting diode) and audible alarm acti­vate when the concentration of gas exceeds the factory­set (and user-adjustable) level. A green LED indicator
on the monitor shows that power is connected and it is
a safe condition.

The standard configuration has a buzzer and normally
operating open relay , a fail-safe normally operating closed
relay is field selectable.

All the electronic circuitry needed to operate the moni­tor, except the DC input power, is contained in a com­pact unit. It may be mounted in any orientation. For a
single-monitor installation and a local alarm, the accom­panying AC-to-DC power supply may be plugged into a
standard AC source. The monitors accept 9 - 24 VDC.

Features

 Self-check feature signals sensor failure

Semiconductor-T ype Sensor

A solid-state semiconductor-type sensor and associated
electronic circuitry ensure trouble-free, long-term opera­tion. There are no pumps, filters or chemical cells to
replace or maintain. Except periodic calibration to verify
the alarm setting, no attention is required after installa­tion. The user may adjust the alarm level by using a
different calibration gas concentration.

A sensor self-check feature will flash the LEDs on and
off alternatively and sound an interrupted tone as a warn­ing should the sensor fail (open circuit).

Remote Alarm Available

If a remote alarm is desired, the Model 2102 Dual Chan­nel Alarm Panel can be connected up to 500 feet from
the monitors.

Benefits

 Reliable operation
 Optional normally operating closed relay
 No chemical cells to replace, no periodic

maintenace other than routine claibration

 All the electronic circuitry needed to operate

the monitor contained compact unit, power
suplly plugs into standard AC source

Sierra Monitor Corporation 1991 T arob Court Milpitas, CA 95035 (408) 262-661 1 [phone] Fax: [phone]

 Fail-safe configuration

 Maintenance free operation

 Quick easy installation and connection to

alarm panel

Gas Sensor Monitors

Model 2001 Combustibles Gas Monitor

The Model 2001 can detect a wide range of combus­tibles. Typical applications include combustible gas
monitoring in basements near waste dumps, manhole,
tanks, parking garages and vehicle maintenance facili­ties, laboratories, chemical plants, and more.

Model 2003 Hydrogen Sulfide Monitor

The Model 2003 can be used in such typical applica­tions as waste water treatment plants, laboratories and
chemical plants.

SPECIFICATIONS

INDICAT ORS:
Visual: Green LED for Monitor “ON"/Safe

Audible: Sustained alarm tone for as long

SENSOR TYPE: Solid-State Metal Oxide Semiconductor
RANGE; (at 50% relative humidity)

Model 2001 300-2,000 ppm Hydrogen

Model 2003 10-50 ppm Hydrogen Sulfide (H
Model 2006 50-500 ppm Carbon Monoxide (CO)
FACTO RY ALARM

SETPOINT :
Model 2001 1000 ppm Methane

Red LED for Alarm
LEDs oscillate on/off for sensor failure

as gas is present. Interrupted tone or sensor
failure.

500-10,000 ppm Methane

S)

2

Model 2006 Carbon Monoxide Monitor

The Model 2006 Carbon Monoxide Gas Sensor Mod­ule can be used to provide an early warning of CO
accumulation in tanks, laboratories, chemical plants,
parking garages, vehicle test facilities and more.

OUTPUT : 0.5 AMP dry contact. 100 VDC, 130 VAC

Nominal 5 volts DC, source 25 mA, SAFE and
ALARM signals 70 dB buzer.
TTL interface to Model 2102 Alarm Panel is
user configurable.

RESPONSE TIME:
Model 2001 Less than 30 seconds

Model 2003 Less than 60 seconds
Model 2006 Less than 30 seconds
PERIODIC

MAINTENANCE: None, other than routine calibration
OPERA TING

TEMPERATURE -4oF to158oF
RANGE: -20°C to 70°C

ENCLOSURE
MA T ER IA L: Aluminum

Model 2003 50 ppm H2S
Model 2006 100 ppm CO
INPUT: 9 - 24VDC (+1V), 250 mA

Plug-in 120 VAC AC/DC Power Supply is
provided

SIZE: 3.7 x 2.2 x 1.1 in. (9.4 x 5.7 x 2.8 cm)

WEIGHT : 3.8 oz (108 g)
APPROVAL : UL 61010-1:2001

CSA-C22.2

ORDERING INFORMA TION

Combustible Gas 2001-00
Hydrogen Sulfide 2003-00
Carbon Monoxide 2006-00

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-661 1 800-727-4377 FAX: [phone]

Visit our Web site at: www .sierramonitor .com E-Mail: sierra@sierramonitor .com

Rev . A2-4-15-1 1 © 2008 by Sierra Monitor Corporation