Qualitrol Corporation offers three product brands: Qualitrol, AKM and Hathaway.

Qualitrol and AKM brands incorporate protection equipment for transformers (oil filled and dry-type), load tap changers,   breakers, switchgear, and voltage regulators.
The product line includes:
Temperature monitors and indicators
Liquid level monitors and indicators
Pressure relief and relays
SF6 Gas Density Monitors

Qualitrol’s Hathaway brand product line
includes:
Intelligent Electronic Devices (IEDs)
and Electromechanical Devices to protect
transmission and distribution equipment such
as transformers, breakers and voltage regulators.
Digital Fault Recorders
Sequence of Event Recorders and Annunciators
Transmission and Distribution Line
Fault Locators
Data Concentrators - both Remote Terminal
Units (RTUs) and Substation Information
Server Gateways (SIS)
Supervisory Control and Data Acquisition products

Mechanical Temperature Products
4�?150/151 Series Direct-Mount Thermometer
5�?165/167 Series Direct-Mount Thermometer (w/switches)
6�?104 Series Remote-Mounted Mechanical Thermometers
6�?104-400 Series SCADA Output Thermometer
AKM Bi-Metal Contact Thermometers
AKM Oil Temperature Indicator Series 34 (OTI) OTI 3440112-6.0(TD111)
AKM Winding Temperature Indicator Series 35 (WTI)  WTI 3540112-6.0(TD111)

Parts:  AKM48450-1, AKM48510, 48515-1, AKM47877, AKM47875, AKM44677, AKM44674