Technical Specifications​

Pressure type: absolute vacuum

Series: E48W

Connection: 1/4 in VCR / MVCR high-purity port

Setpoint: factory calibrated

Contact: SPDT, gold-plated

Repeatability: high, atmosphere-independent

Cycle life: up to 5 million cycles

Surface finish: 5 Ra electropolished wetted surfaces

Functional Features​

Absolute reference eliminates barometric error

Metal-to-metal sealing for clean gas

Tamper-proof factory setpoint

Vibration-resistant spring diaphragm

Hermetic gold-plated contacts

Structural Features​

All-welded metal body

No internal elastomer contamination

Belleville spring diaphragm

Low internal dead volume

316L stainless steel wetted parts

Material Composition​

316L stainless steel

Beryllium copper spring element

Gold-plated contacts

PTFE-insulated leads

Nickel alloy metal gasket for VCR

Working Principle​

Process vacuum acts on the isolation diaphragm. The diaphragm deflects against a sealed absolute vacuum reference. At setpoint, the spring mechanism actuates the SPDT contact to send an alarm or control signal.

Application Scenarios​

Semiconductor wafer fabrication

Ultra-high-purity gas delivery

Pharmaceutical vacuum processes

Aerospace vacuum testing

Cleanroom process equipment

Installation Requirements​

Use only metal VCR gaskets

No rubber O-rings in high-purity service

Torque fittings to specification

Install away from mechanical shock where possible

Usage Notes​

Do not adjust factory setpoint

Prevent particle contamination

Verify leak-tightness before process gas flow

Avoid reverse pressure beyond rating