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Manning VL

Continuously monitor for potential leaks in the vent lines of refrigeration systems.
Features and Benefits
  • Extremely reliable sensor assembly
  • Simple to install
  • Potential to help lower insurance rates
Quick Specs
  • Sensor is embedded in a 2” forged steel bull plug 
  • Four-point terminal strip to connect sensor and pre-amp
  • Linear 4/20 mA output pre-amp housed in separate enclosure
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Additional Information

Product Overview

The Manning Vent Line sensor continuously monitors vent line headers for Ammonia and fluorocarbons. The Manning Vent Line (VL) is designed to continuously monitor for high concentrations of Ammonia or fluorocarbons in vent lines of refrigeration systems.

High concentrations of refrigerant gases in vent lines are warnings of system overpressure or leaking relief valves. Either can pose danger to employees and equipment. Wasted refrigerants are costly and can mean overtime labor and plant downtime.

Designed to be installed in refrigeration vent lines, the VL sensor is supplied with a 2” cast steel “T”, plug and nipple.

The sensor is embedded in a 2” forged steel bull plug and houses a four-point terminal strip for electrically connecting the sensor and pre-amp. The linear 4/20 mA output pre-amp is housed in a separate enclosure.

The Manning Vent Line leak detector is designed to be electrically connected to and monitored by all Honeywell Analytics readouts or can send a signal directly to a PLC.

Additional Features and Benefits


  • Ammonia or Fluorocarbon Monitoring of Refrigeration System Vent Lines
  • Equipment Rooms
  • Refrigeration Systems

Beneficial Features

  • Improves personnel, product and equipment safety
  • Extremely reliable sensor assembly
  • Easy to calibrate and adjust
  • Simple to install
  • Continuous monitoring
  • Can potentially lower insurance rates
  • Input directly to central alarm systems
  • Linear 4/20 mA output


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. 

Simply click on the arrow pointing down next to “LANGUAGE” in the red bar at the very top of the page.  A drop down list will appear and you can select any language from the list.

Our Technical Library has all the documents you’ll need for current and legacy products.  Select the “Legacy Product” filter in the left-hand column to find the documents for your product.  If you still can’t find the information you need, visit the Contact Us section of the website and a service representative will be glad to assist you. 

BW Technologies is part of the Honeywell Analytics family so in an effort to provide our customers with complete gas detection solutions we merged the and websites.  We hope that having all of our brands and products in one location will make it easier for you to find the right solution for your gas detection needs. 

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