Profile: H-B Instrument Co. is a manufacturer of temperature, density and weather related instruments, as well as power controls. We are an ISO 9001:2000 certified company. Our products include clocks, emergency flashlights, equipment, hydrometers, stopwatches, thermometers, timers, weather instruments and barometers. We provide services such as mercury exchange program and thermometer calibration services. Our thermometers are calibrated for total immersion to indicate accurate temperature when the thermometer is immersed to the liquid level in the capillary. Our immersion thermometers are used at partial immersion depths or vice versa.