The Honeywell L4006A1959 Aquastat is a temperature limiting control for use in boilers, hot water tanks and other hydronic applications. It has SPST switching and contacts break on a temperature rise. The copper sensing bulb can be mounted directly or in an immersion well (sold separately).

• Application:                       Temperature control in boilers, hot water tanks, hydronic applications
• Construction:                    Totally enclosed Micro-switches
• Switch Action:                   Contacts break on temperature rise (SPST)
• Bulb Size / Material:          3/8 inch x 2 7/8 inch / copper
• Temperature Range:       40 to 180 degrees F
• Differential:                         2.0 degrees F fixed
• Mounting:                           Horizontal or Vertical