Dwyer

Level Switches

Model: HF658

Mfr. No.: F7-BT

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  • Level Switches - Dwyer F7-BT

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Description

  • Hermetically sealed reed switch contacts are actuated by magnets bonded inside the float
  • Change from normally open (N.O.) to normally closed (N.C.) contacts in 10 seconds or less by reversing the orientation of the float on the stem
  • Switch contact ratings are suitable for direct connection to most solid state control systems and alarm/monitoring devices
  • Simple relay interfaces can be employed for higher current control applications
  • Switch mounts easily at the top, bottom or intermediate levels in tanks and vessels
  • Mounts directly in a 1/8" NPT fitting for interior mounting
  • Where exterior mounting or access is required, special adapters are available as option
  • To mount at intermediate levels, combine fittings shown with any length of pipe
  • Electrical Ratings: Model HF658: AC - 30W, 0.14 A, 220 V; DC - 0.28 A, 24 V, 0.07 A, 120 V

Specifications

Operating Temperature

220°F (105°C)

Float Material

Buna-N and epoxy

Stem Material

Polybutylene Terephthalate

Max. Temp

220°F (105°C)

Max Pressure

150 PSIG (10 bar)

Min Sp. Gr.

0.45

Deadband

1/8" (4 mm)

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