Multiple Aquastat® Controller

Application: High/Low Limit; Switch Action: SPST; Diff.: 10°F (High); 10 to 25°F (Low);

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  • An immersion type liquid-filled sensing element actuates two snap switches
  • One switch operates as a high limit control
  • The other switch operates as a low limit and/or circulator control, depending on the model
  • Controller may be mounted in any positioning and needs no leveling
  • Separate, easy-to-read, calibrated dial and setpoint adjustments for each switch
  • Differential adjustment on low limit or circulator switch on select models
  • All adjustments accessible inside front cover
  • Push-in terminals for quick connecting
  • Single sensing element for easy installation
  • Two SPST snap switches act independently at respective temperature settings

Application: High/Low Limit; Switch Action: SPST; Diff.: 10°F (High); 10 to 25°F (Low);


Low limit: 110°F to 220°F |High limit: 130°F to 240°F

Product Specifications

ApplicationHigh/Low Limit
Diff.10°F (High); 10 to 25°F (Low)
Switch ActionSPST
Shipping Weight1.75
Shipping Width4.49
Shipping Length6.22
Shipping Height3.62

Compliance & Notes

Harmonize Code9032896025

See catalog page 492 for additional notes and/or restrictions.

Warranty Information

WARRANTY - Johnstone Supply will administer and promptly process all warranties in accordance with the manufacturer's specific warranty policies and procedures.

WHOLESALE ONLY - Identification is required of purchasers. Possession of Johnstone's catalog does not constitute an offer to sell by Johnstone or the right to purchase from us.

RETURNS - All returns are subject to a restocking charge.

Brand Name:
See other: Honeywell - Relays
See all: Honeywell Products

Mfg. #: L4081A1023