Armstrong International A21191 Electrode Set R-410A it is specifically pitched and

it is specifically pitched and sized for Heil Quaker and ICP systems

The 1F83C-11NP features an easy-read backlit display

For technicians performing a 63873-SER ignitor replacement

This unit is specifically rated for a 120V coil voltage

Durable Construction: Features silver contacts and heavy-duty terminals to resist pitting and ensure long-term mechanical reliability in high-cycle applications

Armstrong International A21191 Electrode Set R-410A it is specifically pitched andThe Armstrong International A21191 Electrode Set is a critical OEM replacement part designed for high precision water level monitoring in industrial and commercial humidification systems. This authentic water level electrode set of 3 is specifically engineered for compatibility with the Armstrong HumidiClean HC Series (including models HC 4100, 4145, 4300, and 4500) and GFH Series humidifiers. By utilizing advanced conductivity sensing technology,