Honeywell Commercial 121371E Aquastat Sensor Well Assembly

Aquastat Sensor Well Assembly — Honeywell Commercial 121371E delivers robust immersion-type sensing for commercial HVAC systems. This capillary sensor well combines precise temperature sensing with dependable stainless steel construction, engineered to withstand demanding industrial environments.

Designed for reliability, it features an immersion-style bulb with a capillary and a sturdy stainless steel body. Key specs include a bulb size of 3/8 inch diameter by 3 inch length, a 1/2 inch threaded connection for secure mounting, and an insulation depth of 1-1/2 inches to minimize heat loss. The capillary diameter is 5/64 inch, and the unit carries a pressure rating of 255 PSI at 300°F, making it suitable for boiler and hydronic systems. The package includes the 121371 mounting clamp for quick, trouble-free installation.

• Immersion-type sensor well with capillary
• Stainless steel construction for durability
• Bulb size 3/8" diameter x 3" length
• 1/2" threaded connection
• Insulation depth 1-1/2"
• Capillary diameter 5/64"
• Pressure rating 255 PSI at 300°F
• Includes 121371 mounting clamp

Trustworthy performance for precise temperature control in commercial heating and cooling systems, backed by Honeywell's engineering legacy.