Micro Pneumatic Logic Inc. designs differential pressure switches that are sensitive to as low as 0.10" in water. The switches feature operating temperature of -40 to 120 C, and burst of 25 psi. The differential pressure switches are used in oxygen concentrator, appliance, pneumatic equipment, air filter, exhaust monitoring, automation, and vehicle control applications.

Mid-West Instruments manufactures piston-type, diaphragm-type, and hazardous location-type differential pressure switches that feature maximum working pressures of 6000 psig, 5000 psig, 10000 psig, 3000 psig, 500 psig, 400 psig, 1500psig, or 6000 psig. The switches also feature accuracies of plus or minus 2 to 5 percent.

Whitman Controls Corp. manufactures a line of differential pressure switches that feature a differential increasing pressure range of 7 psid to 250 psid, and a differential decreasing pressure range of 2 psid to 120 psid. The switches also feature fixed, adjustable, or custom set point options.

ITT Neodyn manufactures general purpose and hazardous area differential pressure switches that are categorized by NEMA standards. The switches can be compact in design with stable set points, feature a range of internal wetted materials, or feature weatherproof enclosures.

Orange Research designs differential pressure switches that feature maximum line pressures of 3000, 5000, 10,000, 7500, 3000, 1500, or 100 - with piston, diaphragm, mini-piston, or mini-diaphragm sensors. The switches also feature maximum ranges of 0-150psid, 0-1000 psid, 0-300 psid, 0-50 psid, or 0-30 psid.

Pressure Switches Inc. distributes a non-hazardous location, differential pressure switch for high pressure and low pressure requirements. The switches are rated to NEMA 4, 4X and 13 standards.

Sensocon Inc. manufacture differential pressure switches for very low pressure applications. The switches feature maximum pressure of $' w.c., repeatability of 2 percent, and temperature limits of 5 to 140F.

Thorco Holdings LLC assembles and distributes three series of differential pressure switches including ultra low adjustable, mid-range adjustable, and high pressure adjustable types. The various switches features adjustable ranges of .5" H2O to 100" H2O, 0.3 psid to 110 psid, and 1 psid to 1,000 psid. The switches also feature aluminum or stainless steel wetted materials.

United Electric Controls Inc. designs and manufactures three series of differential pressure switches. The company's J21K series of switches feature adjustable ranges of 30" Hg Vac to 90 psid, while 400 series feature temperature of -180 to 650 F, and pressure of 30" Hg VAC to 6000 psi.