TL2-A Dual Probe Benchtop Reference Thermometer

  • $1,681.95 USD
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(Please note - Thermoprobe products are built to the order and usually require 10 to 12 business days to ship).  PROBES NOT INCLUDED.  ORDER PROBES FROM DROPDOWN BOX

The ultimate in affordable high precision thermometry, The TL2-A reference thermometer is the perfect instrument to cross-check your production level thermometers.  Accuracy is better than 0.1 degrees over a wide range.

The TL2-A is a versatile dual-probe thermometer offering a convenient USB interface for data logging and sensor configuration. The TL2-A is two thermometers in one instrument, with two channels allowing simultaneous temperature measurement in different locations. The TL2-A is well suited for establishing temperature traceability in equipment that requires high accuracy. The TL2-A is also perfect for metrology applications and as a calibration reference thermometer.

The TL2-A dual-probe thermometer can be ordered with sensors included or the user can provide their own sensors. Sensor coefficients can be entered from a PC making it easy to change from a daily use RTD to a SPRT including user selectable choice of ITS-90 or Callandar-Van Dusen equations. Units come with 5 point resistance calibration from 20 to 425 ohms. With available PRT(s) ThermoProbe can provide a temperature reference system. Standard sensors are 100Ω wire-wound platinum RTDs in a stainless steel ¼” sheath 13” long. The sensors are provided with a standard 5 foot cable and DIN plug. Custom configurations and temperature ranges are available upon request.

The intuitive user interface allows easy configuration of temperature units, display resolution and a relay output. Minimum, maximum and average temperatures are automatically stored to memory for later reference. The interface allows viewing of Highest, Lowest and Average Readings, Zero Offset adjustment for sensor drift and readings in C, F, K and Ohms. The versatile data logging feature can be used to send data to a PC or stored to a USB Flash drive.

The TL2-A dual-probe thermometer is constructed from rugged powder-coated steel and aluminum. The large backlit display is easy to read from a distance. With the provided AC power supply, the TL2-A reference thermometer is ideal for benchtop or laboratory applications.  A one year warranty, calibration report, USB cable, Flash drive, interface software and country specific power adaptor are included.



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Large 0.5" ( 1.3cm) character LCD with backlight
Switchable units °C ,°F,°K or Ω
Resolution 0.01 , 0.001 or 0.0001 for Ohms

User Functions

Switchable units °C ,°F,°K or Ω
Resolution 0.01 , 0.001 or 0.0001 for Ohms
Zero Offset adjustment
Temperature triggered SPDT relay output (Channel 1)
Stores and displays Average, Lowest & Highest readings.
Arrows indicating increasing/decreasing temperature.

PC & Data Logging Features

Data capture to USB Flash drive saved in CSV format (comma delimited)
Data capture to PC via HyperTerminal
Selectable logging intervals and polling mode
2-Channel Sensor coefficient entry


Rugged powder coated steel enclosure with silicone buttons and a durable polyester graphics window.
Nominal Body Dimensions: 7.25 x 5.25 x 2.25" (18.4 x 13.3 x 5.7cm)
Nominal Weight: 1lb. 10oz (0.74kg)


Standard 5 Point Calibration:
Resistance Accuracy
20Ω +/-0.002°C
100Ω +/-0.007°C
190Ω +/-0.015°C
265Ω +/-0.021°C
425Ω +/-0.032°C


Resolution: 0.001 Degrees
Range: -328°F to 1764°F (-200°C to 962°C)
-depending on sensor selection
ITS-90 or Callandar-Van Dusen Linearization equations
Factory Calibration of TL2-A & PRT system available for
-4°F to 572°F (-20°C to 300°C) range
Standard Calibrated Accuracy:
±0.06°F from -30 to 320°F
±0.03°C from -36 to 160°C
Custom calibration points and ranges available
NIST Traceable Report of Test


Accepts 100Ω and 200Ω RTD, PRT or SPRT
4 wire with shield, 5 pin male DIN connector

Standard sensors:
– 100Ω wire-wound platinum RTD
– Stainless steel ¼” sheath 13” long.
– Provided with a standard 5 foot cable and DIN plug.
– Custom configurations available upon request.
– Recommended Minimum Immersion Depth: 4.7" (12cm)


90 ~ 264 VAC External power adapter
– Country specific adapters available upon request


NIST Traceable Resistance and Temperature


Specifications subject to change, see data sheet for latest information.
Custom ranges and configurations available upon request.



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838 reviews

I hope it last as long as the first one (10 years)

Easy to find

Your site is easy to use Even for an old person. Thanks

Great delivery and good deal

Job complete


1 - It took way too long to receive order, recommend you use another shipper.
2 - I was told ordered item would soon no longer be produced.
3 - If I need additional weather gear in the future, I will look for another provider.

We're sorry your package was delayed. Unfortunately this is more common than it used to be but once shipped, we're all at the mercy of the carrier.