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Category Archives: Pressure Switches

Industrial gas and air pressure switches for Industrial Combustion Systems.

2023 C911-P Ad Retrospective

If you’re following us on social media, you might have noticed a monthly image featuring Baron von Olsträd and our C911-P pressure switches. What’s up with that? In the fall of 2022, we won FM Approval for C911-P, and this meant we could start selling them for use in NFPA86 compliant combustion systems. It was Read More

FAQ: Pressure Switches

Pressure switches are part of the safety chain, and vital to the safe operation of a combustion system. They are used to verify gas and air pressure, and they can be used to determine whether the gas valves are leaking. How does a pressure switch work? Pressure switches are simple devices that use a spring Read More

FAQ: How do you wire devices with metric electrical connections?

Conduit For many years, the use of rigid or liquid-tight conduit was the standard for running wires to field devices, such as safety shut-off valves, pressure switches, and flame safety devices. Rigid conduit is thin walled metal tubing that helps to protect wires from mechanical damage and some environmental factors. Liquid-tight conduit is flexible and Read More

New Combustion Pressure Switch Accessories!

We’re excited to announce our all-new accessories for the C911-P combustion pressure switch are in stock and available now! What’s new? The electrical connection for the C911-P is M18x1.5. This might be an unusual size for some of you, so we are now stocking a cable gland that may be purchased separately if needed (pictured Read More

C911-P Pressure Switches

Say hello to our new automatic reset pressure switch! The C911-P is FM Approved for use with gas and air in industrial combustion systems. They’re designed to detect rising, falling, and differential pressure. Best of all, they’re in stock and available to ship fast from Kent, OH. What does a pressure switch do? A pressure Read More

FAQ: What Is a Pressure Switch Used For?

Q: What is a pressure switch? A: The purpose of a pressure switch in a combustion system is to keep the system from running or to shut the system down if pressure conditions are not within safe operating parameters. How Pressure Switches Work A pressure switch detects the presence of fluid pressure; in our case, Read More

FAQ: DL vs DG Pressure Switch

Q: I need to purchase a new pressure switch to monitor the pressure at my combustion blower. My setpoint is 18 “w.c., but when I called to order a DL 50AT, I was told that no stock was available, and that the wait could be up to five weeks. I can’t wait that long – Read More

FAQ: DG Pressure Switch T-Product vs European Standard

Q: I have a Kromschröder pressure switch, model DG 6U-3, which I do not find on your website. Can you quote this model? Do you have any stock available? A: Certain product families, like the VAS, DG, and IFS, are segregated into two branches: T-Product and European Standard. T-Product models are manufactured with the North Read More


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