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Affordable temperature probes designed for LabJack devices

Brew Data has developed a full line of high quality, industrial grade, solid state temperature probes that are designed to work well with LabJack's DAQ hardware. These probes are accurate, easy to wire and install, and can be used in a wide variety of applications. They are available in a variety of styles and lengths.

All probes use solid state temperature sensors, which gives them an advantage in accuracy and ease of use compared to other sensor types such as RTDs or thermocouples. Solid state sensors have their signal conditioning electronics built along side the actual sensor, so they can directly drive an analog to digital converter without any extra signal conditioning. Also, because of how solid state sensors are measured, these probes don't have any special wiring requirements, and can be connected to cables using simple wire nuts.

All probes are made from 316 stainless steel and are designed to be used in industrial environments. This makes them ideal for use in breweries, food and beverage production, or any other application with sanitary or watertight requirements.

Every one of Brew Data's probes are designed to be compatible with LabJack's equipment. No extra circuitry, or signal conditioning is needed. Brew Data even uses the UE9 for probe quality assurance and development and U3 devices in control systems.

See the full selection of temperature probes on Brew Data's website.

Developments in LabJack software

We are continually making improvements to our software and libraries - here are some highlights from the last few months:

LJM Library

  • Added constants look-up functions LJM_LookupConstantValue and LJM_LookupConstantName. These functions allow users to quickly and programmatically identify the meaning of status codes and other device-specific information, without consulting the device datasheet.
  • Added support for output streaming. This functionality increases the maximum speed of analog waveform outputs on DAC lines, and also provides flexibility for the shape of digital waveform outputs. Currently only useful to the T7 device.
  • Improved speed of searching for LabJack hardware using the ListAll function.
  • Added handle auto-healing, which improves reliability and robustness. Basically retries communication for spurious corrupt packets.
Example Code
  • Added LJM examples for VisualBasic .NET, which can be found on the .NET examples page.
  • Registers tagged with SPI, I2C, SBUS, EXFLASH, TDAC, LUA, and STREAM are now visible on the Misc. tab when added manually.
  • Now updates the session data when the user presses the "Refresh Device List" button.
  • A lightweight, demonstration app that uses Java and the jamod library to interface with TCP Modbus devices such as the T7. It's designed for simple R/W access to Modbus registers over Ethernet/WiFi on your Android platform. 


Digit with replaceable CR1632 battery!

The popular Digit-(TL/THL) series loggers now has a replaceable CR1632 battery! Another key improvement is the addition of a clear plastic enclosure so that light readings can operate while inside. If customers prefer the rugged aluminum enclosure, it can be purchased as an add-on item. See the Digit-TL/TLH product page for more information.

Read about the differences between harware versions in Appendix A of the datasheet. Or look at the product brief below.

Digit-TLH Product Brief

1 Year in the pond - Digit-TL reliability test

When we first started selling Digit-TL devices, we decided to stow one outside under a rock, and another in the pond to see how they'd hold up. After 6 months we downloaded the results to verify operation, and everything looked good, so we threw them back out. Now, after a full year, they're still going strong. See the data and photos below.

Each day is a small spike, and the yearly trend is shown by the overall shape of the graph. The two curves on the graph demonstrate how the water acts as a thermal buffer by regulating fluctuations in daily temperature.  If you look carefully, you can tell when there is snow covering the Digit-TL on land, because the temperature fluctuation is minimal (like the Digit-TL in the water).


Bobcat & Tube

Great video filmed Sunday morning outside the kitchen of a LabJacker's house ... just about a mile from the LabJack office in Lakewood, CO.

A rabbit has been living in this tube (drain pipe) for the last couple weeks.  Sunday morning our local bobcat found it and spent a full hour trying to get at the rabbit before he finally gave up.





Custom PC Water Cooling

"Performance of the computer is somewhat secondary to the performance of my cooling system."

This Goliath PC cooling setup runs on a complex network of piping, refrigeration, water tanks, and wiring.  The chiller and chiller tank pumps are controlled by hand and the rest is controlled with the U3-LV's and DaqFactory.  It was designed and built by a customer in Ontario, Canada.  Expand the post for more information on the setup, and details on how it was built.


Digit-TL is now available

Have an urge to measure the temperature in your refrigerator, attic, or car?  The Digit-TL might be just what you need.  LabJack is proud to announce the arrival of a new family of data loggers, the Digit Series.  

A LabJack Digit-TL is a battery powered temperature logger which can store up to 260,000 readings, and has a battery life of 3 years.  Record data in a wide variety of applications, and download (to .csv) over USB to a Windows based computer using the free Otero software.

Holiday TurDuckEn!

It's a Chicken inside of a Duck, inside of a Turkey! In terms of LabJack projects, this goes a bit off the beaten path.  One of our employees demonstrates his skills as a chef while also testing out a prototype of our new Digit series logging device.  Inspired by J. Kenji Lopez-Alt, from The Food Lab at Serious Eats.  The Food Lab is an intersection of science and food.  A great source for geeks who like to cook!


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Treadmill Desk

My work time is almost all at the computer.  I've noticed that if I spend all day sitting and working at a computer, I wind up feeling lethargic with strange aches and pains.  Not only am I not making any fitness progress, but I actually feel like sitting is causing damage.

After hearing many experts say that sitting for a long time is bad, I decided I should look at a stand-up desk.  As I researched the stand-up desk, I came across information about treadmill desks, and decided that was even more interesting.  If I wound up not liking walking while computing, I could always just stand at the treadmill desk.

Well, it turns out that walking is way better than standing.  When I stand and compute for long I find that I slouch, lean on things, and generally think about the fact that I am standing.  When I walk and compute I forget I am walking.  My body is busy and walking keeps it in a good posture without thinking about it.

I generally walk at 2.0 mph.  I have no problem with typing, programming, and other computer stuff.  Even the fairly intensive mouse operations of LabVIEW programming are no problem.  It is difficult to write on a piece of paper on the desk while walking, but I don't do much of that.

Things slow down a bit at LabJack around Christmas, so I took the time then to research and build my treadmill desk.  I looked at $1500 motorized desks that move up and down, a $550 TrekDesk treadmill desk from Amazon, and various homemade options at  The motorized desk was too expensive and still needed something to get a monitor up at the proper height.  The TrekDesk had some reviews saying it wiggled and still needed something to get a monitor up at the proper height.  Once I saw some of the things people had done at, I realized the key was separating the base from the rest of the treadmill, and building a setup with that in mind.  I wound up using cheap and simple track shelving from Home Depot.  It is very sturdy and lets me put everything at the perfect height.


I bought a 1 year old ...