Oil Switches
Oil Level Controller
Oil Level Switch
Oil Return Switch
Oil Return Controller

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Article Liquid group Power supply IP class Thread Output Fluid Temp. Contact function IECEx/ATEX  
Article Liquid group Power supply IP class Thread Output Fluid Temp. Contact function IECEx/ATEX  
HBSO1-PNP/NO-2
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NO
3/4" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT PNP 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBSO1-PNP/NO-1
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NO
1/2" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" NPT
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1/2" NPT PNP 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBSO2-PNP/NO-2
Oil Level Switch - IP54
For PAG & POE oil, PNP/NO
3/4" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT PNP 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBSO1-SSR-1/NO-2/HT
High Temperature Oil Level Switch - IP54
NO - 24 V AC/DC, 0 - 145 C - Solid State
3/4" NPT - PAO & Mineral oil - set screw
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • Solid State Relay
  • 0 to 145°C (32 to 293°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT Solid State Relay 0 to 145°C (32 to 293°F) NO (Normally Open) No
HBSO2-SSR-1/NO-2/HT
High Temperature Oil Level Switch - IP54
NO - 24 V AC/DC, 0 - 145 C - Solid State
3/4" NPT - PAG & POE oil - set screw
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • Solid State Relay
  • 0 to 145°C (32 to 293°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT Solid State Relay 0 to 145°C (32 to 293°F) NO (Normally Open) No
HBOR-PNP/NC-2
Oil Return Switch for NH3 systems
Output: PNP, Contact function: NC
3/4" NPT - w. set screw connection IP54
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • PNP
  • -40 to 80°C (-40 to 176°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 3/4" NPT PNP -40 to 80°C (-40 to 176°F) NC (Normally Closed) No
HBSO1-NPN/NC-2
Oil Level Switch - IP54
For PAO & mineral oil, NPN/NC
3/4" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • NPN
  • 0 to 80°C (32 to 176°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 3/4" NPT NPN 0 to 80°C (32 to 176°F) NC (Normally Closed) No
HBSO1-PNP/NC-2
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NC
3/4" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 3/4" NPT PNP 0 to 80°C (32 to 176°F) NC (Normally Closed) No
HBSO1-PNP/NC-1
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NC
1/2" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" NPT
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 1/2" NPT PNP 0 to 80°C (32 to 176°F) NC (Normally Closed) No
HBSO1-NPN/NO-5
Oil Level Switch - IP54
For PAO & mineral oil, NPN/NO
1/2" BSPP - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" BSPP
  • NPN
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1/2" BSPP NPN 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBSO1-SSR-1/NC-2/HT
High Temperature Oil Level Switch - IP54
NC - 24 V AC/DC, 0 - 145 C - Solid State
3/4" NPT - PAO & Mineral oil - set screw
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • Solid State Relay
  • 0 to 145°C (32 to 293°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 3/4" NPT Solid State Relay 0 to 145°C (32 to 293°F) NC (Normally Closed) No
HBSO1-PNP/NO-5
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NO
1/2" BSPP - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" BSPP
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1/2" BSPP PNP 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBOR-PNP/NO-6
Oil Return Switch for NH3 systems
Output: PNP, Contact function: NO
3/4" BSPP - w. set screw connection IP54
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" BSPP
  • PNP
  • -40 to 80°C (-40 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" BSPP PNP -40 to 80°C (-40 to 176°F) NO (Normally Open) No
HBOR-PNP/NO-2
Oil Return Switch for NH3 systems
Output: PNP, Contact function: NO
3/4" NPT - w. set screw connection IP54
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • PNP
  • -40 to 80°C (-40 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT PNP -40 to 80°C (-40 to 176°F) NO (Normally Open) No
HBSO1-SSR-1/NO-1/HT
High Temperature Oil Level Switch - IP54
NO - 24 V AC/DC, 0 - 145 C - Solid State
1/2" NPT - PAO & Mineral oil - set screw
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" NPT
  • Solid State Relay
  • 0 to 145°C (32 to 293°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1/2" NPT Solid State Relay 0 to 145°C (32 to 293°F) NO (Normally Open) No
HBSO1-NPN/NO-2
Oil Level Switch - IP54
For PAO & mineral oil, NPN/NO
3/4" NPT - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • NPN
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 3/4" NPT NPN 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBOR-PNP/NO-1
Oil Return Switch for NH3 systems
Output: PNP, Contact function: NO
1/2" NPT - w. set screw connection IP54
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" NPT
  • PNP
  • -40 to 80°C (-40 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1/2" NPT PNP -40 to 80°C (-40 to 176°F) NO (Normally Open) No
HBSO1-PNP/NC-5
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NC
1/2" BSPP - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1/2" BSPP
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NC (Normally Closed)
  • No
Oil 24V AC/DC IP54 1/2" BSPP PNP 0 to 80°C (32 to 176°F) NC (Normally Closed) No
HBSO1-PNP/NO-7
Oil Level Switch - IP54
For PAO & mineral oil, PNP/NO
1 1/8" UNEF - w. set screw connection
  • Oil
  • 24V AC/DC
  • IP54
  • 1 1/8" UNEF
  • PNP
  • 0 to 80°C (32 to 176°F)
  • NO (Normally Open)
  • No
Oil 24V AC/DC IP54 1 1/8" UNEF PNP 0 to 80°C (32 to 176°F) NO (Normally Open) No
HBOC/C-2
Oil Management Control Switch, 24 VDC
W. cable for solenoid valve - 24 VDC out
Front House, 3/4" NPT Solid State alarm
  • Oil
  • 24V AC/DC
  • IP54
  • 3/4" NPT
  • Valve control + SSR
  • 0 to 80°C (32 to 176°F)
  • No value
  • No
Oil 24V AC/DC IP54 3/4" NPT Valve control + SSR 0 to 80°C (32 to 176°F) No value No
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Oil Switches

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