A panel meter is a device that comes with a display and gives you a readout in either analog or digital form. These days, digital panel meters are preferred over analog meters by many. Panel meters have a number of uses, one of which is measuring water temperature. There are panel meters that will also give you a reading of the humidity along with the temperature of the water. Some are battery powered and others are solar powered and come with a battery back-up.
Various types of panel meters are used in laboratory settings, at commercial aquariums, and by people who have aquariums in their homes. Anyone who raises fish in an aquarium knows it is important to keep track of the water temperature in order to insure the survival of their fish and plants. Some meters come equipped with a high/low temperature alarm to alert you when there’s a problem.
Panel meters come with a probe, and when inserted into the water, the thermostat in the meter will show you the temperature on the display. Many models come with a switch that allows you to change back and forth from Celsius to Fahrenheit. Since these meters come with cords and probes of various lengths, it’s easy to select the meter that’s right for your needs. If you own several aquariums, you’ll want to have a separate meter for each one.
Other uses for various types of panel meters include electrical current, flow, and voltage monitoring, in addition to temperature control.
The AQ150 manufactured by General Tool is a digital aquarium thermometer that comes with a large, easy to read display. Other features include a backlight, foldaway stand, a room and outer sensor temperature switch, a Fahrenheit to Celsius switch, minimum and maximum temperature memory and Velcro mounting tape. It has an ambient temperature range of 14 to 122 degrees Fahrenheit (-10 to 50 C) and a remote temperature range of -58 to 158 Fahrenheit (-50 to 70 C). It comes with a 10 foot cord and has an accuracy of 1.8 F (1 C). The unit uses one ‘AAA’ battery.