Piston type pressure switch NT20 series

Principle structure

The built-in piston is connected to the precision spring. When the pressure changes, the spring’s expansion and contraction amount changes accordingly. When the pressure reaches the set value, it will trigger the preset mechanical structure and send out a switch signal.

Product Features

Compact structure; Using DIN standard plugs, wiring is extremely convenient; Wide measurement range (0… 400 bar);High overload capacity (up to 1230 bar); High repeatability; Having open or normally closed contacts; Contact gold plating

Large contact capacity.

Technical Specifications

• Measurement range: see selection table for details
• Medium temperature: -20… 85 ℃ (-40… 160 ℃ optional)
• Output: Gold plated normally open and normally closed contacts
  ≤DC 42V, 1A
  ≤DC 115V， 0.15A
  ≤AC 42V , 3A
  ≤AC 125V, 3A
  ≤AC250V， 0.5A
• Protection level: IP65
• Error: 3% set value
• Delay: 10… 20% set value
• (25% -35%, 1% -5% optional)
• Medium temperature: -20… 85 ℃ (-40… 160 ℃ optional)
• Wiring method: Terminal wiring
• Material: Diaphragm (<12bar type): NBR
• Piston (>12 bar type): Steel piston with NBR seal
• Process connection: Galvanized steel
• Shell: Engineering plastic

Applicable Medium

Can be used for measuring the pressure of water, oil, and gas.

Wiring Diagram

Size chart