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TREX-8 Multi-Use Temperature Logger with External Probe

  • $54.00 USD
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Call For QTY Pricing Over 50 Units
  • Interchangeable External Probe with high quality gold plated connector
  • 8000 reading memory capacity with up to 3 year battery life
  • 'OK' & 'ALERT' Indicator with high and low alarms
  • Industry best download time - less than 5 seconds for full memory
  • IMPORTANT:  Each location (not each logger) requires a LogTag Cradle in order to program and retrieve data from the logger.

The LogTag® TREX-8 is a versatile, wide range, multi-trip Temperature Recorder with interchangeable External Probes, featuring high resolution temperature readings over a measurement range of -40°C to +99°C (-40°F to +210°F).

Interchangeable Remote Probes – LogTag remote temperature probes are interchangeable provided they are changed with LogTag ST100 type remote temperature sensors.  Please note that this logger requires one external probe per logger, and one cradle per facility. Using the LogTag® Interface Cradle and the freely available companion software LogTag® Analyzer, the LogTag® TREX-8 is easily set-up for recording conditions including delayed start, sampling interval, number of readings, continuous or fixed number of readings and configuration of conditions to activate the 'ALERT' indicator.

Please click here to view the probes.  Remember, a probe is required for this Logger.





External Sensor Measurement Range

-40°C ~ +99°C  (-40°F ~ +210°F)

Recorder Operating Temperature Range

-40°C ~ +85°C  (-40°F ~ +185°F)


< 0.1°C for -40°C ~ +40°C,

< 0.2°C for +40°C ~ +80°C


With recorder case sitting in environmental temperature between 0°C ~ 50°C the rated accuracy is:
Better than ±0.5°C for -10°C~ +40°C
Better than ±0.7°C for -10°C~ -30°C & +40°C~+60°C
Better than ±0.8°C for -30°C~ -40°C & +60°C~+80°C
Better than ±1.0°C for +80°C~+99°C

Sensor Reaction Time

T90 typically less than 2 minutes in moving air (1m/s) for ST100T,ST100H & ST100S types.


8032 readings (16K bytes memory)

Sampling Frequency

Adjustable, 30 seconds to several hours

Logging Start Options

Push button start or specific date & time.

Recording Indication

Flashing 'OK' indicator / flashing 'ALERT' indicator.

Download Time

Typically with full memory (8000 readings) in less than 5 secs depending on computer or readout device used.



Power Source

3V LiMg battery

Battery Life

2 ~ 3 years of normal use (based on 15 minute logging, download data monthly.





Standard external sensor cable lengths

Standard: 1.5m (4’11”)

Extended: 3 m (9’10”) (recommended maximum)

External Sensor Cable Type

PTFE (FDA food contact rated) coaxial

Case Material


Other Features

• Logging start by push button or specific date/time start

• Optional clearing of alert indication by push button (places inspection make at same time).

• Download inspection mark recorded in LogTag memory every time LogTag is downloaded.

• 'Prestart' fail-safe logging (records temperature data even if not started)

• Low Battery indication in software.

• Comprehensive Alert indicator configuration.

• Calibration to achieve higher accuracy possible.



EMC Compliance

Tested and complies with EC EMC directives (EN 50081-1:1992 & EN 61000-6-1:2001) see LogTag®TREX CE mark EMC declaration of conformance

Tested and complies FCC Part 15 Subparts A and B. see LogTag®TREX FCC EMC declaration of conformance

FDA CFR21 Part 11 Compliance

Designed for FDA CFR21 Part 11 Digital signatures

RoHS Directive

The RoHS Directive stands for "the restriction of the use of certain hazardous substances in electrical and electronic equipment". This Directive bans the placing on the EU market of new electrical and electronic equipment containing more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants.


Product Brochure

View product highlights & full specifications as a downloadable PDF

Click here to download the Product Brochure


TREX-8 Quickstart Guide

Learn how to quickly operate the TREX-8 device following the step-by-step instructions.

Click here download the TREX-8 Quickstart Guide



Get answers to your questions 24/7 by visiting our resource and support section.

Click here to view the support area


LogTag® Analyzer Software

Get access to our free software which you can use with the TREX-8 device.

Click here to download the latest version of LogTag® Analyzer

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★ Reviews

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209 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