Industrial Flame and Gas Systems

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705 HT Series of Flammable Gas Sensors

UL certified, explosion-proof flammable gas detectors with high temperature version certified to 150°C.
Features & Benefits
  • Fast response speed/low power consumption
  • Greater than 5 year operating life
  • High-grade aluminum construction 
Quick Specs
  •  Operating temperature range: -25° to +150°C (-13°F to +302°F)
  •  Operating pressure: 75 to 110kPa (750 to 1100mbar)
  •  Range: 0-20% LEL, 0-100% LEL (control card dependent)
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Additional Information

Product Overview

The Model 705 high temperature sensor has been specifically designed for the detection of combustible gases in high temperature hazardous area locations.  Typical applications include turbine enclosures and drying ovens used in solvent based printing and coating machines.

These applications require a sensor that provides reliable and stable detection allowing low-level alarm settings across a wide temperature range. Utilizing a specially matched pair of Sieger poison resistant combustible gas detection elements, the Model 705 High Temperature Sensor has a very stable baseline allowing alarm trip points to be set as low as 5% LEL across a temperature range of -25°C to +150°C (-3°F to +302°F). The gas measuring range can be configured from 0-20% LEL up to 0-100% LEL depending on the type of controller used. 

The detector elements are housed in a UL hazardous area approved explosion proof assembly, and provide an industry standard 3 wire mV bridge output which can be connected to a suitable control device or converted to an analog output signal via a field transmitter.

Additional Features and Benefits:

Excellent Performance
•  Certified for hazardous location operation  up to +150°C (+302°F)
•  Alarm trip points as low as 5% LEL
•  Fast speed of response
•  Poison resistant detectors
•  Low power consumption

Cost Effective

•  Low cost disposable sensor
•  Greater than 5 year typical operating life

Reliable Operation

•  Specially matched ‘Sieger’ detectors provide highest stability
•  Proven technology from the World leader in combustible gas detection

Flexibility

•  Measuring ranges from 0-20% LEL to 0-100% LEL
•  Wide range of accessories

Robust Construction
•  UL approved explosion proof enclosure
•  High grade Aluminum construction.

705 HT

Popular Accessories

From power options to carrying cases, we have a multitude of accessory items to go with your monitor.
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Duct mount

1283-1047
Duct mount adaptor assembly
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Flow housing

00780-A-0035
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Junction Box

2441-0022
UL/CSA aluminum 6 wire junction box assembly

Frequently Asked Questions

Have a question about the product features or warranty? Find the answers here.
We do not sell our products directly on our website but we would be happy to assist you with your gas detection needs.  On each product page you will see a red button on the right-hand side titled “HOW TO BUY”.  If you click on this button a form will appear which will go directly to one of our sales representatives once completed and submitted.  

You can also call one of our sales representatives directly.  Click here to go to the Contact Us page.  

There are two areas where you can access technical documents.  First, you can visit our Technical Library in the Support section of the website.  Here you will be able to access our entire catalog of documents and videos for all products – current and legacy products.  

You can also access the technical documents for each product on that product’s respective page within the website.    


Yes we do.  Check out our HA University training section to see what programs are available and sign up for any that you are interested in.  These courses are very informative and led by our expert engineers.  If you have any questions about training opportunities for yourself or your staff and would like to talk to a Honeywell representative, click here.

Check out the Product Inquiry page in the Contact Us section.  Here you’ll find sales contacts for each of our product lines and they can help you with any questions you may have from technical specifications to ordering information. 

Check out the Service & Repairs page in the Contact Us section.  Here you’ll find the contact information for our service centers in your region. 

There are several ways you can search for products on our website:

  • Click on the Products link in the main navigation to search by product lines.
  • Find products for a specific Industry or Application by clicking on the links in the main navigation bar at the top of the page.
  • Use our Gas Finder if you’re looking for a product that can detect a specific type of gas.
  • If you still can’t find the product you’re looking for, type the name of the product in the search bar at the top of the page.

Because we do not sell our products directly we cannot quote a specific price on our website.  Contact a sales representative through either the “HOW TO BUY” button on the product page or by calling them and they will be able to obtain pricing from local distributors in your area. 

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Looking For More Information?

Check out these documents. If you can't find what you're looking for here, check out our Technical Resource library.
Industrial Product Guide
Industrial Product Guide
Language: English US