Features & Options

● Easy to Access Field Adjustable Setpoint from 0.1" to 35" W.C.

● UL 353 Listing So the Unit Can Be Used for Safety Controls

● 5 Amp Silver Contacts

● Built In Pressure Snubber for More Stable Readings

The Delta Differential Pressure Switch is ideal for air filter monitoring, static pressure proving, airflow proving or auxiliary fan actuation. Because of its UL 353 Limit Control Listing, the Delta Switch can be used in safety circuits to protect heating appliances, heating systems, processessing systems and HVAC/R systems.

The setpoint is field adjustable from 0.1" to 35" W.C, and the unit can
measure positive pressure, vacuum or true differential pressure. The
seven pressure ranges are field selectable by changing a color-coded
spring. The spring for the range that you order is preinstalled, and the
other six springs are shipped with the unit so that you can change ranges in the field if you choose.

The unit features a rugged plastic enclosure that protects the electrical terminations and pressure adjustment screw which is easily accessed through a port in the front cover using a square screwdriver bit (BA/SQ1BIT). The quick connect wiring terminations are accessed by opening the hinged cover. The unit is very compact and can be mounted directly on a flat surface with the rugged mounting feet, and the pressure barbs accept 3/16" or 1/4" tubing.

The unit also features an extremely high proof pressure of 100" W.C. so that it will continue to function properly even if it is accidently connected to an unusually high or low pressure.

Ordering Information

Description
ZPS-SW1: . ................Differential Pressure Switch, 0.10" to 0.52" W.C. (25 Pa to 130 Pa)
ZPS-SW2: . ................Differential Pressure Switch, 0.40" to 1.40" W.C. (100 Pa to 349 Pa)
ZPS-SW3: . ................Differential Pressure Switch, 1.20" to 2.55" W.C. (299 Pa to 635 Pa)
ZPS-SW4: . ................Differential Pressure Switch, 2.35" to 6.40" W.C. (585 Pa to 1,594 Pa)
ZPS-SW5: . ................Differential Pressure Switch, 5.22" to 12.84" W.C. (1,300 Pa to 3,198 Pa)
ZPS-SW6: . ................Differential Pressure Switch, 11.64" to 23.68" W.C. (2,899 Pa to 5,898 Pa)
ZPS-SW7: . ................Differential Pressure Switch, 21.67" to 35.32" W.C. (5,398 Pa to 8,798 Pa)

BA/SQ1BIT: . .............Square Screwdriver Bit to turn the Pressure Adjustment Screw

Specifications

Measurement Media: Air, Combustion Gases Operating Temperature: -40°F to 185°F (-40°C to 85°C) Operating Humidity: 5 to 95% RH non-condensing Contact Ratings: 28 VA pilot duty, 24 VAC

1/10 HP, 120-277 VAC
125 VA Pilot Duty, 125 VAC

2.5 A Inductive, 125 VAC

5 A Resistive, 125 VAC

Proof Pressure: 100" W.C.
(3.6 PSI, 24,900 Pa)

Pressure Ports: 1/4” Barbed Fittings Switch Type: SPDT (Silver Contacts) UL Limit Control Listing: 353