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Aquastat Relays

45 results found that include 45 Products

Aquastat relay choices from Grainger operate with a 24VAC thermostat or a 750mV thermostat, depending on the model. Choose from immersion controllers, universal electronic, multi-zone and dual aquastat controllers with a variety of temperature ranges and differentials and SPST or SPDT switching types. Check to see whether mounting is horizontal, vertical or horizontal and vertical. Find the aquastat relay that fits your application at Grainger!Close

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  • Remote bulb Temperature Control Aquastat Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Remote bulb Temperature Control Aquastat Controller, Temp. Range 100° to 240°F

    Item # 5TB811

  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 40° to 180°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 40° to 180°F

    Item # 2GZL31

  • Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    HONEYWELL

    Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    Item # 2E8211

  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    Item # 2GZN31

  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Item # 2GZL41

  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    HONEYWELL

    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Item # 2GZL91

  • Strap-On or Well Mount, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Strap-On or Well Mount, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    Item # 2GZN51

  • High Limit and Relay Control of Burner and Circulation Control Immersion Controller, Multizone, Temp

    HONEYWELL

    High Limit and Relay Control of Burner and Circulation Control Immersion Controller, Multizone, Temp

    Item # 2E8611

  • Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    HONEYWELL

    Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    Item # 2GZK31

  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Item # 278X891

    Web Price
    $189.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Item # 278X901

    Web Price
    $196.50 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    HONEYWELL

    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Item # 278X911

    Web Price
    $196.50 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 200°F

    HONEYWELL

    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 200°F

    Item # 278X921

    Web Price
    $248.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Item # 278X931

    Web Price
    $147.50 / each
  • Boiler-Mounted, High or Low Limit, and Circulator Delay Immersion Controller, Temp. Range 100° to 24

    HONEYWELL

    Boiler-Mounted, High or Low Limit, and Circulator Delay Immersion Controller, Temp. Range 100° to 24

    Item # 278Y071

    Web Price
    $138.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    HONEYWELL

    Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Item # 278X951

    Web Price
    $193.50 / each