Honeywell High Limit/Low Limit Aquastat Controller, 40F – 180F

Honeywell High Limit/Low Limit Aquastat Controller, 40F – 180F

Honeywell High Limit/Low Limit Aquastat Controller, 40F – 180F QR Code
Product Code: L4006A1959 UPC: 085267048682

Availability: Out Of Stock

Weight:1.50 lb

Dimensions (L x W x H ): 12.50 x 5.00 x 3.00

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The L4006A1959 from Honeywell is a High Limit/Low Limit Aquastat, 40F-180F. 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. Honeywell's L4006 are used in applications that utilize the existing wells.


  • 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.

Technical Specifications:

  • Application: High or Low Limit;
  • Dimensions (Height x Width x Depth): 5 5/8”  x 2” x 2 1/8” (143 mm x 51 mm x 54 mm);
  • Temperature Range: 150°F with 1.2 A 24 V load, 77°F with 1.4 A 24 V load (66°C, 25°C);
  • Mounting: Vertical or Horizontal;
  • Operating Temperature Range: 40°F - 180°F (4°C – 82°C);
  • Differential Temperature: 5°F to 30°F adj (3°C to 17°C adj);
  • Electrical Ratings, Burner & Circulator: Millivolt - 8A @ 120 Vac: 5.1A @ 240 Vac; At Locked Rotor-- 48A @ 120 Vac: 30.6A @ 240 Vac.
Product Specs
Application:High Limit
Bulb Size:3/8" x 2-7/8"
Capillary Length:3"
Depth (Inches):2-1/8"
Electrical Rating:0.25 A @ 0.25 to 12 Vdc
Electrical Ratings (ALR):30.6A @ 240 Vac
Max Ambient Temp (°F):150 F
Max Temp Differential:2°F
Switch Action:Contacts Break on Temp Rise
Temperature Range (F):40°F to 180°F
Well Included:No
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