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MIN/MAX Recording Thermometer with Alarms

Model #RT8100MAT

Dual channel measurement
Stores max and min with time and date
Low and high alarm limit setting
LED and audible alarms
Magnetic back and flip out desk stand
°C/°F switchable

Normally $29.00
Gift Wrap (info)
Limited EditionPharmAlarm™ 2
Commercial version includes product simulant sensors for critical storage of vaccines or pharmaceuticals. Includes a NIST-traceable cal cert.
Go here to learn more.
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The RT8100MAT is a two channel thermometer that records the date and time of the minimum and maximum readings, while independently monitoring user programmable high and low alarms. It's a perfect tool for environmental monitoring or storage temps at home or work.

How It Works
For each channel, set a high and low alarm limit from -58°F to 158°F conveniently from the front panel. Turn on the alarm indicator and when the readings exceed the pre-set alarm limits, an audible alert will sound and the red alarm LED will flash. If the readings return to acceptable limits, the audible alarm will turn off; however, the alarm LED will continue to flash until it is reset to indicate that at some point during the test period, or since the last reset, an alarm was reached.

In addition to keeping track of alarm conditions, the RT8100MAT also records the date and time of the max and min temperatures reached. While you're away, you'll not only know that an alarm condition was met, but how far above or below your limits the temperature reached. And, unlike more expensive data loggers, you won't need a computer or software!

Buy an RT8100MAT for each of your industrial fridge/freezer units or any other critical storage need. With a convenient flip out stand and magnetic pads, you can mount the RT8100MAT conveniently for ease in routine checks.

Home Use
Everybody needs a couple of these at home. Track daily temperatures in the house or in the garden. Know the highs and lows, and when they occurred, at your exact location. Put one on your fridge/freezer. You'll save hundreds of dollars in ruined foods. Trying to regulate an aquarium? Track the temperature over hours, days or weeks for the highs and lows. Have a greenhouse? Get it set-up just right with the info this thermometer delivers.

PharmAlarm 2PharmAlarm 2
This commercial version of the product includes product simulant sensors for tracking critical storage of vaccines or pharmaceuticals. Includes a NIST-traceable certificate of calibration. Go here to learn more.



Range -58 to 158°F (-50 to 70°C)
Alarm Range -58 to 158°F (-50 to 70°C)
Accuracy ±1.8˚F (±1˚C)
Resolution 0.1˚
Display Reading Update 10 seconds
Program Alarm Resolution 1˚ F or C
Time Accuracy ±3 seconds per day
Time Display Format 12 hour
Date Display Format Month/Day/Year
Effective Calendar Period 2000 to 2099
Battery 1.5 volt, type AAA or equivalent x 2 pieces (included)
Probe Cord Length 39.4 inches (1,000 mm)
Display 3.5 (W) x 0.63 (H) inches
90 (W) x 16 (H) mm
Dimensions 5.3 (W) x 1.77 (H) x 0.9 (D) inches
135 (W) x 45 (H) x 23 (D) mms
Included Accessories 1) 1.5 volt, type AAA battery x 2 pieces
2) Suction cups x 2 pieces


Convenient flip-out stand or
magnetic pads for easy mounting.

Magnetic back mounts easily for quick display.

Cal Cert

NIST-Traceable Temperature Calibration

Model: CAL-2PT

  • 2-Point calibration
  • Traceable certificate

2-point temperature calibration performed in ThermoWorks' NIST-Traceable calibration lab. Includes calibration report and actual test data.
(Please allow 1 week for cal lab processing)

(For multi-channel loggers/devices order a calibration for each channel you want calibrated).


Duracell Procell AAA Batteries

Model: PC2400

  • AAA battery - 4-pack
  • 7-year freshness guarantee
  • Reliable operation in temperature extremes
  • Contains no added mercury
Package of 4 Duracell AAA Procell batteries. Manufactured to rigid specifications to meet some of the highest standards of durability and longevity that professional users demand and expect. Delivers outstanding performance with a 7-year freshness guarantee backed up with date coding. Rated for reliable operation in temperature extremes from -4 to 129°F (-20 to 54°C).

Cal Cert

Temperature Log Book

Model: TLOG1

  • 6" x 9", 36 pages
  • Meets HACCP requirements
  • Includes calibration log
Quick and easy way to keep temperature records. Records date, time, item or location, temperature, comments or actions, and initials. Tips and reference temperatures are provided as well as simple instructions to check a thermometer's calibration.

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Gift Wrap

Gift Wrapping

We'll wrap your gift in our custom gift paper, trimmed with a bow and gift tag. The rich, graphite and silver combination is suitable for any occasion or anybody.

Enter a custom message for the handwritten tag (Up to 50 characters). Cost for wrapping is $4.99 per item. Each item wrapped separately. Selectable in the order info where available. Some items can not be wrapped.

Ordering more than one of the same item but don't want them all wrapped? Just add each item you want wrapped to your shopping cart individually and select the wrapping option. Add your custom greeting for each wrapped item separately as you add the item to your cart.

Gift wrap orders are shipped in a plain box without packing slips. We're trying our best to keep the surprise.