Intrinsically Safe Digital Thermometers for Hazardous Locations since 1983.
Designed and Made in the USA


Precision Bench-top Laboratory Reference Thermometer – Dual Channel & USB Data Logger


The TL2-A is a versatile 2-channel precision bench top thermometer offering a convenient USB interface for data logging. 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.

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 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 is ideal for bench top 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


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)


Resolution: 0.001 Degrees
Factory Calibration of TL2-A & PRT system available for
-40°F to 572°F (-40°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 up to 2 probes
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)
– Temperature time constant: 10 seconds in circulated water bath (time response to 63.2% of temp. step change)


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.