Solid State Gas Sensor Monitors 20X/200X

Solid State Gas Sensor Monitors 20X/200X

Sierra Monitor’s 20X/200X gas sensor monitors consist of three gas sensor modules used to monitor combustible gas, Hydrogen Sulfide (H2S), and Carbon Monoxide (CO).

The 20X/200X monitors are based on solid state (semiconductor) technology, a simple and robust method of detection capable of detecting low points-per-million (ppm) levels of gases.

Oil & Gas rigs methane level monitor system

Though the 20X and 200X monitors look different in structure and size, the two monitors function similarly. The solid-state type sensor and associated electronic circuitry ensure trouble-free, long-term operation. There are no pumps, filters, or chemical cells to replace or maintain. With the exception of periodic calibration to verify the alarm setting, no attention is required after installation. The standard configuration has a normally operating relay, with a fail-safe normally operating closed relay being field selectable.

The Solid State Gas Sensor Monitors 20X and 200X are approved and certified by a variety of third party agencies, including UL and CSA. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.

No Periodic Maintenance

Operate monitors free of maintenance; no need to replace chemical cells

Explosion-Proof Enclosure (20X)

Continuously operate in work areas where hazardous gases could be present

Compact Unit

Easily install and connect to an alarm panel

Self-Check (200X)

Detect sensor failure for reliable operation

Dry Contact Relay for connection to remote fire panels
Model Numbers
Model 20X Series - All-Weather, Explosion Proof

201 - Combustible Gas

203 - Hydrogen Sulfide

206 - Carbon Monoxide

Model 200X Series - Compact

2001 - Combustible Gas

2003 - Hydrogen Sulfide

2006 - Carbon Monoxide

Sensor Type

20X/200X

Solid State MOS (Metal Oxide Semiconductor)

Indicators

20X

Internal LED for calibration

200X: Visual

Green LED for Monitor “ON”/Safe

Red LED for Alarm

LEDs oscillate on/off for sensor failure

200X: Audible

Sustained alarm tone for as long as gas is present. Interrupted tone or sensor failure

Range (at 50% relative humidity)

201/2001

300 - 2,000 ppm Hydrogen

500 - 10,000 ppm Methane

203/2003

10 - 50 ppm Hydrogen Sulfide (H2S)

206/2006

50-500 ppm Carbon Monoxide (CO)

Periodic Maintenance

20X/200X

None, other than routine calibration

Factory Alarm Setpoint (200X)

2001

1000 ppm Methane

2003

50 ppm H2S

2006

100 ppm CO

Input

20X/200X

9 - 24 VDC (+/- 1 V), 250 mA

200X

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

Output

20X/200X

0.5 AMP dry contact, 100 VAC, 130 VAC Nominal 5 volts DC, source 25 mA SAFE and ALARM signals

200X

SAFE and ALARM signals 70 dB buzzer TTL interface to Model 2102 Alarm Panel is user configurable

Response Time

201/2001

Less than 30 seconds

203/2003

Less than 60 seconds

206/2006

Less than 30 seconds

Operating Temperature Range

20X/200X

-4 o to 158oF (-20o to 70oC)

Enclosure Material

20X

Cast aluminum for protection against galvanic corrosion

200X

Aluminum

Enclosure (20X)

Class I, Division 1, Groups C, D

Size

20X

6.75 x 4.0 x 3.5 in. (17.1 x 10.2 x 6.0 cm)

200X

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

Weight

20X

24 oz. (678 g)

200X

3.8 oz. (108 g)

Approval

20X

UL 61010-1:2004

CSA-C22.2

200X

UL 61010-1:2001

CSA-C22.2

Sentry IT Fire and Gas Detection Solutions

A brief introduction to the sales, design and manufacturing facilities for Sierra Monitor Corporation's Sentry IT fire and gas solutions.

How to Easily Calibrate Sentry IT Gas Sensors with GlobalCal

A video demonstration on how to perform GlobalCal, the simple and time-saving calibration procedure, on all Sentry IT gas sensor modules.