The 'LH' denotes a Left-Hand hood position

and EGH series boilers

Dual Sensing Capability: Combines accurate relative humidity monitoring and Nickel 1000 Ohm temperature sensing in a single duct probe

with a steady 24V secondary output

For technicians performing HVAC system maintenance

Honeywell 30756304-501 Pen Arm 30067439-890 The 'LH' denotes a Left-HandThe Honeywell 30756304 501 Pen Arm is a critical mechanical component engineered specifically for Honeywell DR4500 Truline circular chart recorders. Designed for precision tracking in industrial process monitoring, this replacement pen arm ensures reliable data logging on 12 inch circular charts. As a veteran grade HVACR part, it is constructed to maintain consistent tension and alignment, preventing ink skipping or charting errors during high cycle