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Buy LogTag with External Probe

SKU: LOGEXSET Categories: ,

LogTag with External Probe


  • NATA Certificates are only required by certain industries, and most customers don't need them. If you're not sure, call us on 1300 30 33 34.

    • 0 $
    • 100 $

    Choose Calibration Temperatures

    You can choose three temperatures for the NATA testing to specifically measure against. We recommend that you choose the minimum and maximum temperatures that you care about, plus one a little bit higher. e.g. if you are logging a vaccine refrigerator, you might choose 2°C, 8°C, and 20°C.

LogTag Model TREX-8

LogTag with external probe

LogTag with External Probe


Go where other LogTags can’t

This is the perfect LogTag when you need to measure temperatures inside coolers, underwater or in small spaces. Great for monitoring internal temperatures of food.

Push Button Start

Configure the Tag to use Push Button Start and there is no rush about getting the Tag from the Reader to the refrigerator. Logging will not begin until the Start button is pushed.

Visual Alerts

If the Tag logs temperatures outside the safe range you have set, the Alert LED will flash red, giving you a handy visual notification that there has been a problem.

Easy to use

The LogTag is so simple to set up and use that you'll be an expert in no time. We have a full LogTag training program on our site

Why use an external probe?

LogTags are tough and versatile, but there are some places they just can’t go.

In particular, when logging the temperature of liquids, you will need a probe. An example might be  measuring the cooling rate of a large batch of custard.

Probes are also useful to monitor temperatures inside coolers and other containers without removing the lid.

Another use might be measuring soil temperatures. The probe is driven into the soil while the LogTag remains clean and protected above ground.

If you have any questions about whether this LogTag is right for you, call us on 1300 30 33 34 or email sales@logtag.com.au.

LogTag External Probes

External Probes for LogTags

ST100B – Untipped (bare sensor).

ST100B – Untipped

Bare sensor without stainless sheath ready for fitting to custom probe assembly.

Not rated for food contact or environmentally rated.

ST100J External Probe for LogTag

40mm tip length, ⌀3.2mm

ST100K – 65mm tip length, ⌀3.2mm

65mm tip length, ⌀3.2mm

ST100L – 90mm tip length, ⌀3.2mm

90mm tip length, ⌀3.2mm

ST100S – 30mm tip length, ⌀5mm

30mm tip length, ⌀5mm

Available with 1.5m or 3m cable


ST100T – 140mm tip length, ⌀5mm

140mm tip length, ⌀5mm



Handled with 105mm tip length, ⌀5mm



Product ModelTREX-8
External Sensor Measurement Range-40°C to +99°C (-40°F to +210°F)
Operating Temperature Range-40°C to +85°C (-40°F to +185°F).
Storage Temperature Range-10°C to +55°C (14°F to +131°F).
Rated Temperature Reading AccuracyBetter than ±0.5°C for -10°C to +40°C. Better than ±0.7°C for -10°C to -30°C and +40°C to +60°C. Better than ±0.8°C for -30°C to -40°C and +60°C to +80°C. Better than ±1.0°C for +80°C to +99°C. Actual performance is typically much better than the rated values. Please see the Rated Absolute Accuracy chart below. Accuracy figures can be improved by recalibration.
Rated Temperature Reading ResolutionLess than 0.1°C for -40°C to +40°C. Less than 0.2°C for +40°C to +80°C. Less than 0.6°C for +80°C to +99°C. Please see the Rated Native Resolution chart below. LogTag Analyzer® currently displays to one decimal place of °C or °F. The native resolution is what is stored in the LogTag®.
Sensor Reaction TimeTypically less than 2 minutes (T90) in moving air (1m/s) for ST100T, ST100H and ST100S types.
Recording Capacity8031 temperature readings. 53 days @ 10min logging, 80 days @ 15min logging.
Sampling IntervalConfigurable from 30 seconds to several hours.
Logging Start OptionsPush button start or specific date & time. Optional start delay of up to 18 hours.
Recording IndicationFlashing ‘OK’ indicator / flashing ‘ALERT’ indicator.
Download TimeTypically less than 5 seconds for full memory (8031 readings), depending on computer or readout device used.
Power Source3V Li-Mg Battery.
Battery Life2 – 3 years of normal use (based on 15 minute logging, download data monthly).
Real Time ClockBuilt-in real time clock. Rated accuracy ±25ppm @ 25°C (equivalent to 2.5 seconds/day). Rated temperature coefficient is -0.034 ±0.006ppm/°C (I.e typically +/- 0.00294 seconds/day/°C).
Standard Remote Sensor Cable LengthStandard: 1.5m (4’11″). Extended: 3m (9’10″) (Recommended maximum).
Remote Sensor Cable TypePTFE (FDA food contact rated), coaxial.
Size86mm(H) x 54.5mm(W) x 8.6mm(T).
Weight36g (without External Probe).
Case MaterialPolycarbonate.
Compliance and CertificationsFDA CFR21 Part 11 FCC EMC Directive CE EMC DirectivesConforms to RoHS

Do you have a USB Reader?

To use this LogTag, you will need a USB interface and the LogTag Analyzer software installed on your PC.

This LogTag uses the same Reader as other LogTags, so if you already have one, it will work with these  models.

If not, make sure you order one as well. As a bonus, we include the free Analyzer software on CD.

LogTag in USB Reader

Other LogTags

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