This indicates that the electrical contacts are normally closed and will move to the open position when the sensed pressure rises to the 1

long-term performance without calibration drift

Doing so allows large debris to short out the ionizing wires

you can always go up in voltage rating but never down

this control is rated for both low-voltage and line-voltage applications

Resideo 50001464-004 Sensor Assembly This indicates that the electricalThe Resideo 50001464 004 Sensor Assembly is a critical replacement component for residential and light commercial boiler systems. Designed for technical precision, this 36 inch leadwire sensor provides real time temperature feedback to Honeywell Electronic Aquastat Controllers, including the L7224A, L7248C, and L7248L series. This assembly is a drop in replacement for the 50001464 004 B and includes a pre terminated Molex connector and mounting