Carrier HH12ZB220 Limit SwitchCarrier HH12ZB220 limit switch delivers precise position sensing for reliable automation. Designed for HVAC systems and general electrical control panels, this limit switch provides durable, repeatable switching feedback across demanding environments. Its compact footprint and straightforward mounting fit tight control cabinets while delivering dependable performance and easy wiring for installers. Ideal for industrial automation workflows, this limit

fail-safe shut-off for combustion and heating equipment

pilot-operated diaphragm valve engineered for reliable flow control in demanding environments

designed for demanding industrial piping systems

The kit includes the burner assembly and all necessary fittings for straightforward installation

improving zoning accuracy and energy efficiency

Optimized to communicate with furnace and outdoor unit controls

With trusted Scully engineering

routine service

ensuring tight shutoff and long service life

End-to-end distance: 4

this sensor supports safety and efficiency in your HVAC system

Certification: UL Listed for US/Canada