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Aquastat+ Controllers are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required.

  • Totally enclosed Micro Switch+ snap-acting switches operate on temperature rise to setpoint.
  • Visible control point scale and external adjustment screw permit easy setting.
  • Horizontal or vertical insertion of the sensing element.
  • Direct or well immersion of the sensing element.
  • Models available for strap-on mounting.
  • Remote bulb model may be used to sense air temperature in ducts and in outside air sensing applications.
  • Select models have wells.
Product Specifications

Description : Circulator Control, High Limit or Low Limit Aquastat Controller with 100 F to 240 F operating temperature and 5 F to 30 F adj. Differential
Application : Circulator Control and High Limit or Low Limit
Insulation Depth (in.) : 3 in.
Insulation Depth (mm) : 76 mm
Bulb Size (in.) : 3/8 in. x 2 7/8 in. copper
Bulb Size (mm) : 10 mm x 73 mm copper
Switching Action : SPDT
Operating Temperature Range (F) : 100 F to 240 F
Operating Temperature Range (C) : 38 C to 116 C
Electrical Ratings (millivolt) : 0.25 A @ 0.25 to 12 Vdc
Electrical Ratings (AFL) : 8A @ 120 Vac
Electrical Ratings (AFL) : 5.1A @ 240 Vac
Electrical Ratings (ALR) : 48A @ 120 Vac
Electrical Ratings (ALR) : 30.6A @ 240 Vac
Differential Temperature (F) : 5 F to 30 F adj.
Differential Temperature (C) : 3 C to 17 C adj.
Maximum Ambient Temperature (F) : 150 F
Maximum Ambient Temperature (C) : 66 C
Case Dimensions (in.) : 5 5/8 in. high x 2 in. wide x 2 1/8 in. deep
Case Dimensions (mm) : 143 mm high x 51 mm wide x 54 mm deep
Mounting : Horizontal or Vertical
Approvals, Underwriters Laboratories Inc : UL Component Recognized: File No. MP466, Vol. 6, Sec.1, Guide No. MBPR2
Approvals, Canadian Standards Association : Certified: File No. LR95329-1
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Manuals (1)
Circulator Control
Low Limit
High Limit
Switch Action:
Temperature Range (F):
100°F to 240°F
Electrical Rating:
8A @ 120 Vac
0.25 A @ 0.25 to 12 Vdc
5.1A @ 240 Vac
Electrical Ratings (ALR):
48A @ 120 Vac
30.6A @ 240 Vac
5° to 30°F
Max Temp Differential:
Min Temp Differential:
Max Ambient Temp (°F):
Depth (Inches):
Well Included:
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