United Electric (UE) 400 Series Multiswitch NEMA 4X Differential Pressure Switches

United Electric's 400 Series is designed for processes that require single or multiple switching capabilities. Dual and triple switch versions provide multi-output for alarm and shutdown, pre-alarm and alarm, high/low limit or level staging functions. The triple-switch J403 series can be used for liquid level control by setting outputs to correspond to "pumping out" elevations in a sump.

A wide variety of microswitch and process connection options, along with a weather-tight enclosure, make UE's 400 Series an ideal choice for most general service location applications. Widely used throughout the process industries, the 400 Series provides threshold protection and control for many critical functions.

Key Specifications

  • One, Two, or Three SPDT Switch Outputs
  • Up to Three Electrical Knockouts to Simplify Wiring
  • UL Listed and CSA Certified
  • NEMA 4X Epoxy Coated Aluminum Enclosure when Used with Watertight Electrical Connector
  • Available with Internal Calibrated Reference Dials
  • Adjustable Ranges from 30" HgVac to 6000 PSI

Specifications, Manuals, and Supporting Literature

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Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Adjustable
Setpoint Range
Deadband Proof
Pressure
Working
Pressure Range
Catalog Number
J400K: Single SPDT switch output with internal hex screw adjustment
Welded 316L stainless steel bellows, 1/2" NPTF pressure connections
3 to 30 PSID 0.5 to 2 PSI 300 PSI 30" HgVac to 100 PSI J400K-S147B
Brass bellows, nickel-plated brass 1/4" NPTF pressure connections
3 to 30 PSID
10 to 100 PSID
0.5 to 2 PSI
0.5 to 3 PSI
180 PSI
180 PSI
30" HgVac to 100 PSI
30" HgVac to 150 PSI
J400K-147
J400K-157
Buna-N diaphragm and O-ring, aluminum 1/4" NPTF pressure connectors
5" to 80" WCD
2 to 20 PSID
3 to 30 PSID
1" to 4" WCD
0.1 to 0.3 PSI
0.1 to 0.4 PSI
225 PSI
225 PSI
225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
J400K-455
J400K-456
J400K-457
H400K: Single SPDT switch output with internal adjustment via reference dial
Buna-N diaphragm and O-ring, aluminum 1/4" NPTF pressure connections
5" to 80" WCD
2 to 20 PSID
3 to 30 PSID
1" to 4" WC
0.1 to 0.3 PSI
0.1 to 0.4 PSI
225 PSI
225 PSI
225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
H400K-455
H400K-456
H400K-457
J402K: Dual SPDT switch output with internal hex screw adjustments
Brass bellows with nickel-plated brass 1/4" NPTF pressure connections
3 to 30 PSID
10 to 100 PSID
0.5 to 2 PSI
0.5 to 3 PSI
180 PSI
180 PSI
30" HgVac to 100 PSI
30" HgVac to 150 PSI
J402K-147
J402K-157
Buna N diaphragm and O-ring, aluminum 1/4" NPTF pressure connections
5" to 80" WCD
2 to 20 PSID
3 to 30 PSID
1" to 4" WC
0.1 to 0.3 PSI
0.1 to 0.4 PSI
225 PSI
225 PSI
225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
J402K-455
J402K-456
J402K-457
Kapton diaphragm, Buna-N sealing diaphragms, epoxy-coated aluminum
1/8" NPTF pressure connections
2" to 20" WCD
5" to 50" WCD
15" to 100" WCD
2 to 20 PSID
5 to 50 PSID
0.5" to 2" WCD
0.5" to 5" WCD
0.5" to 7" WCD
1 to 2.5 PSI
1 to 3 PSI
400 PSI
400 PSI
400 PSI
2500 PSI
2500 PSI
30" HgVac to 200 PSI
30" HgVac to 200 PSI
30" HgVac to 200 PSI
30" HgVac to 1200 PSI
30" HgVac to 1200 PSI
J402K-541
J402K-542
J402K-543
J402K-544
J402K-545
H402K: Dual SPDT switch output with internal adjustment via reference dial
Buna N diaphragm and O-ring, aluminum 1/4" NPTF pressure connections
5" to 80" WCD
2 to 20 PSID
3 to 30 PSID
1" to 4" WC
0.1 to 0.3 PSI
0.1 to 0.4 PSI
225 PSI
225 PSI
225 PSI
30" HgVac to 225 PSI
30" HgVac to 225 PSI
30" HgVact o 225 PSI
H402K-455
H402K-456
H402K457
Teflon and Buna-N diaphragms, Buna-N O-ring, aluminum 1/4" NPTF pressure connections
10 to 100 PSID 0.2 to 1 PSI 225 PSI 30" HgVac to 225 PSI H402K-559

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