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Pressure

01

MEASURING PRINCIPLE

Capacitive differential pressure

Two process pressures deflect a sensing diaphragm between capacitor plates; the capacitance change is proportional to the pressure difference.

PRINCIPLE · LIVE SIGNAL13.9mA
Capacitive differential pressure: how it works | INSTRAVAPRIN01

02

HOW IT WORKS

See the principle in action

Move the slider to change the process variable and watch the signal respond.

Capacitive differential pressure
Capacitive differential pressure: how it works | INSTRAVASTRAIN GAUGES · ΔR ∝ DEFLECTIONPROCESS PRESSURE
PRESSURE
8.00 bar
OUTPUT
12.0 mA
  1. Process pressure deflects a thin diaphragm.
  2. Strain gauges on the diaphragm change resistance.
  3. A bridge circuit converts the change into a 4–20 mA signal.

03

AT A GLANCE

Strengths and limits

STRENGTHS

Excellent low-range accuracy and stability

LIMITS

Needs impulse lines or capillaries for remote seals

07

FAQ

Common questions

No questions listed yet.

RFQ

REQUEST A QUOTE

Specify the right instrument

Share your process data and we will propose a model, with datasheets and a quotation.

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