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Aquastat Relays

45 products found

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

    Brand
    HONEYWELL
    Item #
    5TB81
    Mfr. Model #
    L4008A1015
    Remote bulb Temperature Control Aquastat Controller, Temp. Range
  • Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    Brand
    HONEYWELL
    Item #
    2E821
    Mfr. Model #
    L6006A1145
    Immersion Well Mounting (Not Included), High Limit, Lo
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 40° to 180°F

    Brand
    HONEYWELL
    Item #
    2GZL3
    Mfr. Model #
    L4006A1959
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    2GZN3
    Mfr. Model #
    L4006E1117
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
  • Strap-On or Well Mount, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    2GZN5
    Mfr. Model #
    L4006H1004
    Strap-On or Well Mount, High Limit, Manual Reset Immersion&
  • High Limit and Relay Control of Burner and Circulation Control Immersion Controller, Multizone, Temp

    Brand
    HONEYWELL
    Item #
    2E861
    Mfr. Model #
    L8148J1009
    High Limit and Relay Control of Burner and Circulation
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    2GZL9
    Mfr. Model #
    L4006E1067
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
  • Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    Brand
    HONEYWELL
    Item #
    2GZK3
    Mfr. Model #
    L6006A1244
    Immersion Well Mounting (Not Included), High Limit, Lo
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    2GZL4
    Mfr. Model #
    L4006A1967
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X90
    Mfr. Model #
    L4006A1009
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $196.50 / each
  • Strap-On or Well Mount, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X99
    Mfr. Model #
    L4006H1004
    Strap-On or Well Mount, High Limit, Manual Reset Immersion&
    Web Price $222.16 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    278X91
    Mfr. Model #
    L4006E1091
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
    Web Price $196.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X93
    Mfr. Model #
    L4006A1967
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $147.50 / each
  • Immersion Well Mounting (Not Included), High Limit, Low Limit or Circulator Control Immersion Contro

    Brand
    HONEYWELL
    Item #
    278X87
    Mfr. Model #
    L6006A1244
    Immersion Well Mounting (Not Included), High Limit, Lo
    Web Price $139.00 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X95
    Mfr. Model #
    L4006A1132
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $193.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278Y01
    Mfr. Model #
    L4006A2007
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $129.00 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X89
    Mfr. Model #
    L4006A1017
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $189.50 / each
  • Boiler-Mounted, High or Low Limit Immersion Controller, Temp. Range 100° to 240°F

    Brand
    HONEYWELL
    Item #
    278X98
    Mfr. Model #
    L4006A1678
    Boiler-Mounted, High or Low Limit Immersion Controller, Temp.&#x
    Web Price $147.00 / each
  • Boiler-Mounted, High or Low Limit, and Circulator Delay Immersion Controller, Temp. Range 100° to 24

    Brand
    HONEYWELL
    Item #
    278Y07
    Mfr. Model #
    L4006B1163
    Boiler-Mounted, High or Low Limit, and Circulator Delay Imm
    Web Price $138.50 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 100° to 200°F

    Brand
    HONEYWELL
    Item #
    278X92
    Mfr. Model #
    L4006E1125
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
    Web Price $248.50 / each
  • Boiler-Mounted, High or Low Limit, and Circulator Delay Immersion Controller, Temp. Range 100° to 24

    Brand
    HONEYWELL
    Item #
    278X94
    Mfr. Model #
    L4006B1007
    Boiler-Mounted, High or Low Limit, and Circulator Delay Imm
    Web Price $191.50 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    278X88
    Mfr. Model #
    L4006E1067
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
    Web Price $204.00 / each
  • Triple Aquastat Relay with High Limit Immersion Controller, Multizone, Temp. Range High Limit 130° t

    Brand
    HONEYWELL
    Item #
    278X97
    Mfr. Model #
    L8124C1003
    Triple Aquastat Relay with High Limit Immersion Controller,
    Web Price $316.00 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    278Y06
    Mfr. Model #
    L4006E1109
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
    Web Price $189.50 / each
  • High Limit and Circulator Dual Aquastat Controller, Temp. Range High Limit 130° to 240°F, Low Limit

    Brand
    HONEYWELL
    Item #
    278X96
    Mfr. Model #
    L4081B1096
    High Limit and Circulator Dual Aquastat Controller, Temp. R
    Web Price $252.00 / each
  • Aquastat® Relay, Universally Compatible, EnviraCOM-Enabled Immersion Controller, Universal Electroni

    Brand
    HONEYWELL
    Item #
    278Y05
    Mfr. Model #
    L7224U1002
    Aquastat® Relay, Universally Compatible, EnviraCOM-Enabled Immersion&#
    Web Price $225.50 / each
  • High and Low Limit Dual Aquastat Controller, Temp. Range High Limit 130° to 240°F, Low Limit 110° to

    Brand
    HONEYWELL
    Item #
    278Y03
    Mfr. Model #
    L4081A1023
    High and Low Limit Dual Aquastat Controller, Temp. Range&#x
    Web Price $274.50 / each
  • High Limit and Relay Control of Burner and Circulation Control Immersion Controller, Multizone, Temp

    Brand
    HONEYWELL
    Item #
    278Y02
    Mfr. Model #
    L8148J1009
    High Limit and Relay Control of Burner and Circulation
    Web Price $291.00 / each
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    2GZN1
    Mfr. Model #
    L4006E1091
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
  • Boiler-Mounted, High Limit, Manual Reset Immersion Controller, Temp. Range 130° to 270°F

    Brand
    HONEYWELL
    Item #
    2GZN2
    Mfr. Model #
    L4006E1109
    Boiler-Mounted, High Limit, Manual Reset Immersion Controller, T
  • Boiler-Mounted, High or Low Limit, and Circulator Delay Immersion Controller, Temp. Range 100° to 24

    Brand
    HONEYWELL
    Item #
    2GZL6
    Mfr. Model #
    L4006B1007
    Boiler-Mounted, High or Low Limit, and Circulator Delay Imm
  • Aquastat® Relay, Universally Compatible, EnviraCOM-Enabled Immersion Controller, Universal Electroni

    Brand
    HONEYWELL
    Item #
    1RZY3
    Mfr. Model #
    L7224U1002
    Aquastat® Relay, Universally Compatible, EnviraCOM-Enabled Immersion&#
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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More