TR-81 Wide Range Temperature Data Logger - Tech Instrumentation

TR-81 Wide Range Temperature Data Logger

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Designed to be used with any three-wired platinum resistance type (Pt100-type) sensor.
The measuring range with a Pt-100 sensor is between -200 °C and 600 °C and it is possible to attach and measure with two sensors.


TR-81 Wide Range Temperature Data Logger Diagram



Measurement Channels 2 Ch (Temperature)
Measurement Range -200 to 600 °C
Accuracy ±0.3 °C [-200 to 80 °C] / ±0.5 °C [80 to 450 °C] / ±1.0 °C [80 to 600 °C]
Resolution 0.1 °C
Adaptable sensor Pt100 with 3 wires
Measuring current 1mA
Recording Intervals 1,2,5,10,15,20,30 sec./ 1,2,5,10,15,20,30,60 min./ Total 15 choices
Logging Capacity 8,000 data sets (One data set consists of readings for all channels in that type of unit.)
Recording Method Endless Method (Overwrite from the oldest data when the capacity is full)
One time Method (Stop recording when the capacity is full)
LCD Display Current Temperature, Recording Indicator, Battery Life Warning, Data Amount, Unit of Temperature, Communication Indicator, Sensor Type, Recording Methods
Battery Lithium Battery (CR-2) x 1
Battery Life Approx. 5 to 8 months
(Battery life differs depending on measurement environment and battery performance. Changing battery is possible even during recording.)
Data Back-up Activated if: Low Battery Power / Switched OFF
Interface Serial Communication (RS-232C)
Communication Speed Download at 9,600 bps (50 sec./per Unit when data is full)
Demensions H123mm x W58mm x D33mm excluding protrusions
Weight Approx.132g (Including 1 Lithium Battery)
Temperature and Humidity Durability of the Unit Temperature: -10 to 60 °C
Humidity: Less than 90%RH (Without dew condensation)


Application Examples:

* Recording temperature during food preparation including cooking pots and fryers
* Temperature management in ultra low temperature freezers
* Temperature management of blood transportation
* Temperature management of compost
* Recording temperature of boiler pipes

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210 reviews

Shipment arrived on time and as ordered.

La Crosse Technologies V10-TH

The La Crosse V10-TH Wireless Weather Station (Model No. C84343) is absolutely wonderful. The setup was easy with the Quick Setup Guide provided with the unit. The packaging contains additional support information with the website and phone number if there are questions. I especially liked the daily high low readings and the color on the unit! Tech Instrumentation provided great communication as to the availability of the product and shipping details. If fact, it arrived one day prior to the estimated delivery date. I would absolutely recommend this product and Tech Instrumentation for anyone looking for an indoor/outdoor weather station!


I needed a replacement as my original sensor no longer worked. This one works fine.

Excellent Customer Service!

I can't way enough about the customer service at Tech Instrumentation. I was looking for a hard to find specialty part, which the manufacturer told me would need to be custom made. After calling and speaking with a representative at Tech Instrumentation, the part was located and order was filled, right over the phone. Delivery was prompt, and instrument is working great. Highly recommended company for lab supplies!

Worked great

Put batteries in and worked great