HM8443-00058, Rochester Gauges (HM8443-58)
HM8443-00058, Rochester Gauges (HM8443-58)

HM8443-00058, Rochester Gauges (HM8443-58)

Regular price $846.25 Sale


HM8443 series side mounted refrigerant level gauges are equipped with proportional voltage output or voltage output TwinSite® sender capsules with ranges of 1-2 volts, 1-6 volts or 0.5 to 4.5 volts output Hall Effect. They interface with various microprocessor based controllers now being used in commercial/supermarket applications for continuous, repeatable measurement of refrigerant levels and rates of loss.

General Information & Features
These gauges feature a 4-bolt brass head with integral mounting pads to accommodate the attachment of an electrical junction box. The junction boxes furnished with these gauges are not watertight and it is recommended that the connections inside boxes be made using waterproof connectors for rooftop and other outdoor service applications.

These gauges are typically furnished with neoprene gaskets which are compatible with several commonly used refrigerants and lubricants. Other gasket materials may be available.

The dials furnished with these gauges are magnetically driven. This means that the dials may be removed and replaced by removing two #6-32 screws and without disturbing the four gauge mounting bolts and releasing receiver contents.

The dials on gauges originally equipped with direct read or direct read plus voltage output are typically interchangeable. In other words, a 1-2 volt output dial could be replaced with a 0.5 to 4.5 volt Hall Effect dial by removing only two #6-32 screws.

Hall Effect dials with 0.5 to 4.5 volt output introduce previously unavailable levels of noise free reliability and longevity. All dials with direct read only and direct read with voltage output are for use in both indoor and outdoor locations.

General Specifications*

Temperature Range
Standard range is -40°F to 158°F, -40°C to 70°C.


Rochester Senior® adapter (typically part # 0022-05200).

Voltage Input
24 VDC maximum.

Working Pressure
450psig [31 Bar].

UL recognized refrigeration component.

Materials of Construction*

Head:  Brass forging.

Junction Boxes & Covers:  Plated steel.

Centershaft, Centershaft Bearings, Pinion & Sector Gears, Cross Stud & Bearing:  Stainless steel.

Gear Housing:  Brass forging.

Support:  Brass.

Float Rod:  Tempered aluminum.

Float Bulb:  One-piece aluminum.

Magnet:  Alnico.

TwinSite® Sender:  Polycarbonate, ultrasonically welded and hermetically sealed.

Mounting Bolts & Dial Screws:  Stainless steel.

Choice of:

Type Part Number
Neoprene 0015-00836 (standard)
Buna-N 0015-00004 (optional)
Viton 0015-00415 (optional)


When Ordering Specify:

1. Tank ID.
2. For replacement gauges, information stamped on the gauge head (see image for example).
3. Part number of gasket desired.

*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.

NOTICE:  This part is available by special order so there will be a manufacturing lead time.