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  1. Detection - Measurement
  2. Flow, Pressure and Level Measurements
  3. Diaphragm pressure switch
  4. ZHEJIANG LEFOO CONTROLS CO., LTD
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Diaphragm pressure switch LF727A
SPDTbare wiresbrass

Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass - image - 2
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass - image - 3
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass - image - 4
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass - image - 5
Diaphragm pressure switch - LF727A - ZHEJIANG LEFOO CONTROLS CO., LTD - SPDT / bare wires / brass - image - 6
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Characteristics

Technology
diaphragm
Contact type
SPDT
Electrical connection
bare wires
Material
stainless steel, brass, steel
Protection level
IP65, IP67
Pressure range

Min.: 0 bar
(0 psi)

Max.: 450 bar
(6,526.7 psi)

Switching power: current

4 A

Burst pressure

600 bar
(8,702.26 psi)

Process temperature

Min.: -40 °C
(-40 °F)

Max.: 100 °C
(212 °F)

Description

Product overview
Diaphragm-type pressure switch designed to monitor a preset pressure and send an electrical signal (SPDT) when the threshold is reached. Used for control, alarm or interlock functions in industrial and automotive systems. Maximum working pressure 450 bar; burst pressure 600 bar.

Applications
  • HVAC
  • Cleanrooms
  • Refrigeration
  • Building automation
  • Water & wastewater
  • Food & beverage
  • Oil & gas
  • Petrochemical
  • Machine building & automation
  • Engineering equipment
  • Appliances
  • Power & energy
  • Agriculture
  • Chemical processing
  • Medical & laboratory equipment


Parameters
Body material: Zinc-plated steel / Stainless steel / Brass
Contact material: Silver-cadmium alloy
Max voltage: 250 VAC / 42 VDC
Max current: 4 A
Working temperature range: -40 °C to +100 °C (depends on diaphragm)
Mechanical life: 1,000,000 cycles
Electrical life: 100,000 cycles
Repeatability: ±2%
IP grade options: Wire leads IP00; Hirschmann IP65; Resined wires IP67
Applicable standard: EN 60730-1
Max working pressure: 450 bar
Burst pressure: 600 bar
Approx. weight: ~140 g

Documents
Datasheet: Diaphragm Pressure Switch LF727A (PDF).

Technical specifications
  • Model: LF727A
  • Type: Diaphragm pressure switch
  • Switch configuration: SPDT
  • Body materials: Zinc-plated steel / Stainless steel / Brass
  • Contact material: Silver-cadmium alloy
  • Electrical rating: up to 250 VAC / 42 VDC, 4 A
  • Operating temperature: -40 °C to +100 °C (depends on diaphragm)
  • Mechanical life: 1,000,000 cycles
  • Electrical life: 100,000 cycles
  • Repeatability: ±2%
  • IP options: IP00 / IP65 (Hirschmann) / IP67 (resined wires)
  • Standard: EN 60730-1
  • Max working pressure: 450 bar
  • Burst pressure: 600 bar
  • Approx. weight: 140 g

Catalogs

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Mechanical Pressure Switch

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