A150Q Min/Max Digital Thermometer with High/Low Alarm | Tech Instrumentation | Thermometers |


  • $25.90 USD
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The Tech Instrumentation A150Q min/max thermometer with alarm is a popular choice for monitoring refrigerators & freezers, terrariums, outdoor temperature in cars, computer equipment and many other applications. A high and low alarm can be set if desired. While in an alarm condition, the A150Q Min/Max Digital Thermometer beeps for 5 seconds out of every minute. If the unit returns to a non alarm condition, the unit stops beeping. The min/max memory can be used to see the highest and lowest recorded temperatures since the memory was last cleared.

Displays ambient & remote temperature (switch between one and the other)
Min/max temperature memory
High/low audible temperature alarm
Room & remote (outdoor) sensor temperature switch
°F/ °C switch
Waterproof Sensor - suitable for aquarium use
Foldaway stand

Note - the probe and cord can be placed in a glycol filled bottle for a slower response time if desired.

Ambient temperature range: 14 ° to 122 °F (-10 ° to 50 °C)
Remote temperature range: -58 ° to 158 °F (-50 ° to 70 °C)
(Note that the cord insulation will become brittle at very cold temperatures. This is not a problem as long as the cord is protected and not moved while extremely cold)
Resolution: 0.1 °
Accuracy: ±1.8 °F ( ±1 °C) over middle temperature range.  Accuracy of 1.5°C to 2.0°C can be expected for extreme temperature ranges (roughly -5 °C and lower and above 70°C)
Sampling rate: 10 second
Cord length: 10 ft. (3m)
Display size: 1.88" x 0.82"
Dimensions: 2.87" x 2" x 0.6"
Power source: 1 "AAA" battery

Supplied With:
Probe Mount Clip
Mounting tape
Optional Certificate of Calibration

Applications Include:
Aquarium Thermometer
Refrigerator / Freezer Thermometer
Indoor / Outdoor Thermometer
Car Thermometer
Many more


Ask a Question
  • Can this be used in an aquarium?

    It is for measuring the temperature of air, it is not an immersion probe.

  • Can the alarm be disabled? Also, will the min max be erased if the battery dies and is replaced? How long is the temperature probe? Thank you

    By default, the alarms are not set.  If they are set, simply change the high limit as high as it can go, and the low limit as low as it can go.  The min/max will be erased if the battery dies or if it is removed.  The probe wire is 10 feet.

Customer Reviews

Based on 4 reviews
Jacob Torres
Works amazing

I'm a refrigeration tech that is just got into the field and this a great starter product it's cheap and works great

Dan C.
Good features, needs gentle handling

I'm buying a replacement because I use it in my truck and it works well. Because there's no metal to attach the magnet to, I lay it in the little coin compartment above my left knee. I pick it up to read it, so the wire gets flexed a lot where it enters the housing. The insulation wore off and the wire shorted out, so I get a reading of HH.H for the outside temps. I'll probably reinforce the wire on the new one with tape or silicone caulk.

James Bigger
Great Fridge & Freezer Monitor

Have one on both my Fridge and Freezer to monitor internal temperature. Alarm sounds if temp gets too high. Monitors both high and low temps. Great little monitor.

Glenn Fessler

Great for an outside temperature for my truck

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