Model 20X Series

Gas Sensor Monitors

Model 201 - Combustible Gas

Model 203 - Hydrogen Sulfide

Model 206 - Carbon Monoxide

The Model 20X Series are all-weather, solid-state, fixed-installation single- alarm monitors designed for continuous area monitoring of Combustible Gas, Hydrogen Sulfide or Carbon Monoxide.

The Model 20X Series consists of 3 gas sensor mod- ules, Model 201 for Combustible Gas, Model 203 for Hydrogen Sulfide and Model 206 for Carbon Monoxide. The monitors provide 0.5 Amp dry contract relay that is activated when the concentration of gas exceeds the factory-set (and user-adjustable) level. A TTL signal can be user configurable to interface with Sierra Monitor's alarm panels. This signal may be used to activate a

remote alarm, fan or process controller.

 

The standard configuration has a normally operating open

 

relay but a fail-safe normally operating closed relay is

 

field selectable. A durable, cast aluminum explosion-

 

proof enclosure houses the sensor electronics. The en-

 

closure provides sealing for hazardous areas - Class I,

 

Division 1, Groups C, D. The sensor with porous metal

 

cover is assembled in an aluminum housing that screws

 

directly into the electronics enclosure. The cover both

 

protects the sensor and acts as a flame-arrestor. The

Remote Alarm Available

monitor can be installed up to 500 feet from the power

 

source.

If a remote alarm is desired (required for 20X-00), the

 

Model 2102 Dual Channel Alarm Panel can be connected

Semiconductor-Type Sensor

up to 500 feet away from the monitors.

A solid-state semiconductor-type sensor and associated

Model 201 - Combustible Gas

electronic circuitry ensure trouble-free, long-term opera-

 

tion. There are no pumps, filters, or chemical cells to

The Model 201 can detect a wide range of combustibles.

replace or maintain. Except periodic calibration to verify

Typical applications include combustible gas monitor-

the alarm setting, no attention is required after installa-

ing in manholes, tanks, natural gas fields, parking ga-

tion. The user may adjust the alarm level by using cali-

rages and vehicle maintenance facilities, sewage treat-

bration gas with concentration equal to the alarm level.

ment plants, laboratories, chemical plants, and more.

 

 

Features

Benefits

nExplosion-proof enclosure

nNo chemical cells to replace, no periodic maintenance required other than routine calibration

Can operate continuously in work areas where hazardous gases could be present

Maintenance free operation

n All the electronic circuitry needed to operate

Quick easy installation and connection to alarm

panel the monitor contained in a compact unit

 

 

 

Sierra Monitor Corporation 1991 Tarob Court Milpitas, California 95035 (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042

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Sierra Monitor Corporation 203, 20X manual Remote Alarm Available, Semiconductor-Type Sensor, Model 201 Combustible Gas
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206, 20X, 201, 203 specifications

Sierra Monitor Corporation (SMC) is a leading provider of integrated solutions for monitoring and controlling various industrial applications. Among its key offerings are the 203, 201, 206, and 20X series devices, which are designed primarily for gas and flame detection. These products leverage cutting-edge technology to ensure safety and compliance in hazardous environments.

The 203 model is recognized for its robust design and flexibility. It is mainly deployed in environments where multiple gas types need to be monitored simultaneously. This device is particularly advantageous because of its ability to connect with various sensors, enabling it to detect gases such as methane, propane, and hydrogen. The configuration options allow users to tailor the device to their specific needs, ensuring comprehensive coverage in diverse settings.

The 201 model, on the other hand, is more compact and focused on targeted applications. It provides an excellent solution for areas with limited space. This model incorporates advanced sensor technology, delivering precise gas monitoring capabilities. The user-friendly interface makes it easy for operators to monitor gas levels in real-time, enhancing operational safety.

The 206 model takes gas detection to the next level with its integrated features. It offers advanced analytics that allow users to visualize data over time, identify potential threats, and react swiftly to hazardous situations. With its cloud connectivity, it provides remote monitoring capabilities, giving users access to vital information from anywhere, thus improving response times and operational efficiency.

Finally, the 20X series exemplifies SMC's commitment to innovation. Known for its superior sensitivity and reliability, this model is ideal for applications in industries such as oil and gas, petrochemicals, and manufacturing. This series supports various communication protocols, making it compatible with existing systems and easy to integrate into larger safety networks.

Each of these models reflects SMC's dedication to enhancing safety standards and operational efficiency. They are crafted using durable materials to withstand harsh environmental conditions, ensuring longevity and reliability. With features focusing on accuracy, reliability, and ease of use, these devices are trusted by industries worldwide to protect personnel and assets against gas and flame hazards. Overall, Sierra Monitor Corporation continues to lead in developing technologies that prioritize safety and compliance in industrial applications.
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