The Honeywell L4006A1678 aquastat control is a mechanical temperature control with an operating range of 100 to 240 degrees F and an adjustable differential of 5 to 30 degrees F. There is a visible scale and a setpoint adjustment screw on the cover. The sensing bulb can be mounted directly or inside and immersion well. These controls can be used to limit temperatures in boilers, storage tanks or other hydronic applications.

• Application:                                 High or low limit temperature control
• Temperature Range:                 100 to 240 degrees F
• Differential:                                   5 to 30 degrees F
• Bulb Size / Material:                   3/8 x 2 7/8 inches (copper)
• Immersion Depth:                      3.0 inches
• Electrical Rating:                        8.0 amps at 120V, 5.1 amp at 240V
• Switching:                                      Contacts break on temperature rise - SPST
• Mounting:                                    Horizontal or Vertical
• Case Dimensions:                    5 5/8 high x 2 wide x 2 1/8 deep (inches)