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Sensors & Instrumentation - Pressure Switches - High Pressure Switches

High Pressure Switches within the range of 30 to 5000 psi.

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 Dietz series 200HP
 Lefoo Series LF20-H

Dietz series 200HP
5 Models of High Pressure Switches
The Dietz 210HP is designed for use in high pressure industrial and commercial applications. Offering five adjustable ranges from 30–5000 psi this switch meet the requirements of demanding hydraulic system. Made from zinc plated steel, with an industrial IP 65 standard connector and a ¼" NPT male pressure port, the 210HP can be mounted directly in the most harsh industrial environments.

  • Adjustable pressure ranges up to 5000 psi
  • Suitable for high proof pressures (9000 psi)
  • Robust zinc plated housing sealed to IP 65
  • Industry standard Din 43650 A electrical connection
  • Mechanical life in excess of 1,000,000 cycles

  • Set Point Ranges: 30–5000 psi
  • Repeatability: ± 2% FS
  • Maximum Overpressure: 9000 psi
  • Mechanical Life: 1,000,000 Cycles
  • Temperature Range: -20 – 180°F

  • Housing Material: Zinc Plated Steel
  • Diaphragm: Nitrile (other options available on request)
  • Pressure Port: ¼" NPT Male
  • Environmental Protection: IP 65
  • Electrical Connection: Din 43650 A
  • Weight: 0.41 lbs

  • Switch Type: SPDT Snap Action
  • Current Rating
    • 5 A 12/24 VDC – 125 VAC
    • 3 A 250 VAC
1.D31000 ... [more details]
Dietz series 200HP, model 210HP-4-4M-C-HC, adjustable pressure range 30–120 psi, with an average differential of 9–20 psi.
2.D31001 ... [more details]
Dietz series 200HP, model 210HP-5-4M-C-HC, adjustable pressure range 75–300 psi, with an average differential of 12–36 psi
3.D31002 ... [more details]
Dietz series 200HP, model 210HP-6-4M-C-HC, adjustable pressure range 300–1200 psi, with an average differential of 69–80 psi
4.D31003 ... [more details]
Dietz series 200HP, model 210HP-7-4M-C-HC, adjustable pressure range 1000–3000 psi, with an average differential of 180–360 psi
5. D31004 ... [more details]
Dietz series 200HP, model 210HP-8-4M-C-HC, adjustable pressure range 2000–5000 psi, with an average differential of 200–400 psi

Lefoo Series LF20-H
The LF20-H pressure switches are robust, compact and designed to operate in harsh environments at various pressures. Because of its special internal design this switch can tolerate high pressure spikes inherent on many pressure systems. The switch is factory calibrated but in the case that adjustment is needed in the field the switch offers an adjustment screw to facilitate any fine tuning required. The standard diaphragm employed is polyimide making it compatible with many gases and liquids. Several other diaphragm materials are available that make the switch compatible with many mediums. Various electrical terminations are available including tabs and a metric-pack connector that forms a tight seal when connected. Because of their ruggedness the LF20-H is a popular choice for the many OEM applications.


 Series No.



Air,motor oils, transmission oils, jet fuels and other similar     hydrocarbon media;  water (provide with special diaphragm material)

 Pressure Set Point

 Factory set from 10 to 400 PSI

 Max Operating Pressure

 500 PSI


 Proof Pressure


 Burst Pressure


 Operating Temperature Range

-40° C to ~ 120° C

 Switch Type

Direct action, blade contact

 Electric Rating

Resistive: 15 AMP- 6 VDC

               8 AMP- 12 VDC

               4 AMP- 24 VDC

Inductive: 1 AMP- 120 VAC

               0.5 AMP- 240 VAC

 Contact Arrangement

 SPST-N.O., N.C.,



 #8-32 screws, 1/4" blade, Metri-Pack
 Connection  1/8"NPT Male, 1/4"NPT Male, G1/8" Male, G1/4" Male


Contact: Silver alloy, gold plated

Base: Plated Steel;

Cover: Glass reinforced polyester

Diaphragm:Polyimide film (other materials is optional according to media)
 Base connector thread sizes; wire leads (potted & sealed);   N.O./N.O. dual circuit and N.C./N.C. dual circuit

Conversion: 1Kgf/cm2 = 14.2PSI ,  1Bar = 14.5PSI
Ordercode Builders:
1.LF20-H-342111-100 ... [more details]
Lefoo Series LF20-H, 75 - 150 set point pressure range, SPST-N.O., user adjustable, stainless steel, 1/8" NPT, 1/4" spade blade, cover style A, set to 100psi