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901 Prescal Pressure Switch Specification and Data Sheet

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901 Prescal Series Pressure Switch
Adjustable pressure switch for monitoring overpressure (5 mbar up to 12 bar), vacuum (-5 down to -700 mbar) or differential pressure (5 to 50 mbar) of liquid, gas and  aggressive media.

The pressure switch uses a scaled adjustment knob to enable the adjustment of trip and reset pressure without the use of a screwdriver.

Contents

  • Page Contents
  • Temperature Range
  • Diaphragm Material
  • Electrical Rating
      • AgNi-contacts:
      • Gold-plated contacts:
  • Electrical connection
  • CE Conformity
  • Service Life
  • Damping
  • Accessories
  • Mounting Position
  • Pressure Connector Type and Material
  • Pressure Ranges
  • Mechanical Dimensions
  • Related Documents
    • Specification data sheets

Page Contents

  • Temperature Range
  • Diaphragm Material
  • Electrical Rating
  • Electrical Connection
  • CE Conformity
  • Service Life
  • Damping
  • Mounting Position
  • Pressure Connection
  • Pressure Ranges
  • Mechanical Dimensions
  • PDF Download

Temperature Range

Ambient temperature from –20°C to 85°C.
Temperature of media up to 85°C or 130°C depending on material of pressure connection and diaphragm.

Diaphragm Material

Depending on media NBR, Silicone, FKM (Viton®), EPDM can be specified.
For 901.8x the standard is Silicone, and others upon request.

Electrical Rating

Values indicated for resistive load

AgNi-contacts:

  • 6 (1.5) A/250 VAC
  • 2 A/24 VDC

Gold-plated contacts:

  • 100 mA/24 VAC
  • 30 mA/24 VDC

AgNi-contacts up to 10 A/250 VAC can be supplied upon request.

Electrical connection

AMP connection 6.3 mm x 0.8 mm DIN 46244.

901 prescal arrangement of contacts
View large image

CE Conformity

Each conforms to technical specification:

  • Low Voltage Directive 2006/95/EC; RoHS Directive 2002/95/EC
  • ATEX-Directive 94/9/EC; Gas Appliance Directive 90/396/EC (only for Type 901.61 to 901.65 with brass pressure connection).

Service Life

Minimum 106 cycles.

Damping

Restrictors alternatively with 0.3/0.5/0.8 mm diameter.

Accessories

Various mounting brackets and protection caps with IP 44,
IP 54 and IP 65.

Mounting Position

Mounting in any position, and should be specified for settings below
100 mbar.

Pressure Connector Type and Material

901 prescal pressure connection
View large image

Pressure Ranges

901 prescal pressure ranges
View large image

Mechanical Dimensions

901 Prescal Mechanical Dimensions
View large image

Related Documents

Specification data sheets

  • 901 Prescal Adjustable Pressure Switch
  • 901 Ex Prescal ATEX IS Adjustable Pressure Switch
  • 901.6x Prescal Adjustable Gas Pressure Switch
  • 901 Fixed Setting Pressure Switch
  • 901 Ex ATEX IS Fixed Setting Pressure Switch
  • 901 Prescal part number configuration

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