is supported by our Pitmaster Club. Also, when you buy with links on our site we may earn a finder’s fee. Click to see how we test and review products.

Lavatools Javelin Pro Review

Share on:
Lavatools Javelin Pro Review
The Lavatools Javelin Pro is a full-featured, hand-held, instant-read thermometer with very good accuracy and quick response times. It is available in a number of colors, useful in a commercial setting where cross-contamination of foods is a problem. The display will rotate, depending on the orientation of the device, making it left-hand friendly for you creative types. The plastic housing is impregnated with an anti-microbial agent for food safety.
Opening the probe, folding knife style, turns on the unit. There is a button on the back side of the display that controls the backlight, the max/min display, and the temp hold function. I found it to be a little quirky – sensitive to double-click intervals – but familiarity may render this criticism moot. If this button is held, the thermometer will beep when a stable temperature is reached, and it will hold the reading until the button is uncovered. 
There are four micro-switches in the battery compartment that allow you to select Fahrenheit or Celsius, turn the auto-sleep function on or off, turn the stabilization feature on or off, and set the resolution to 1º or 0.1º. The user’s sheet leave it up to you to figure out which switch is which. The user’s sheet also describes how to check the unit’s accuracy, but there is no ability to calibrate it.
After ten minutes of inactivity, the unit will shut itself down. Picking it up and waving it will turn it back on. Waving it around will also turn on the backlight, although it takes a brisk shake. There is a magnet on the back to allow fastening the unit to a metal surface when not in use. It is IP65, meaning it is dust tight and resistant to splashes.
The owner’s sheet gives chef-recommended meat temperatures instead of the overly cautious USDA numbers. It also gives candy temperatures for different hardnesses, as well as recommendations for proofing yeast, softening butter and rennet activation.
The unit is warranted for three years. Unfortunately, the manufacturer does not provide any contact information with the unit, either on the packaging or in the user’s sheet. This is a no-no in my book. If you have a problem, who you gonna call? You’ll have to visit their website to get that info.
Build is good. It’s a tightly-built thermometer with a slightly fussy control button. Accuracy is very good, and so is response time. The unit is aggressively priced. All in all, a good unit at a good price. Gold Medal!
  • Thermometer Function:
    Hand Held
  • Item Price:
    $ 49.99
  • Where to buy (buying from this supplier supports this website):
  • Probe:
    Diameter: 0.133" (3.4mm), tip: 0.065" (1.6mm), length: 4.44", (113mm)
  • Battery Type:
    2xCR2032 (supplied)
  • Battery Life:
    4000 hrs (Mfgr.)
  • Min & Max Temp:
    -40 to 482°F (-40 to 250°C)
  • Display Precision:
    0.1º or 1º, user-settable
  • Actual Temp at 32 Degrees:
  • Actual Temp at 130 Degrees:
  • Actual Temp at 225 Degrees:
  • Actual Temp at 325 Degrees:
  • Speed from 32 to 212 Degrees:
  • Speed from 32 to 212 Degrees:
  • Numbers Display Size:
    0.69" (17mm)
  • Weight:
    2.85 oz. (81g)
  • C/F Switch:
    Built in CF switch
  • Backlight:
    Built in Backlight
  • Auto shutoff:
  • Color Options:
    Red, Green, Blue, Gray, Black
  • Included:
    Thermometer, instructions
  • Alarms:
    Beeps on temp stabilization

Published On: 12/11/2017 Last Modified: 1/25/2021

  • Bill McGrath - Bill McGrath is's Thermometer Maven. He has sophisticated equipment, an electrical engineering degree from Cornell University, and an MBA (almost) from UC Berkeley. Despite being mostly retired, he is still the person responsible for developing and updating all of ExxonMobil's training modules.


High quality websites are expensive to run. If you help us, we’ll pay you back bigtime with an ad-free experience and a lot of freebies!

Millions come to every month for high quality tested recipes, tips on technique, science, mythbusting, product reviews, and inspiration. But it is expensive to run a website with more than 2,000 pages and we don’t have a big corporate partner to subsidize us.

Our most important source of sustenance is people who join our Pitmaster Club. But please don’t think of it as a donation. Members get MANY great benefits. We block all third-party ads, we give members free ebooks, magazines, interviews, webinars, more recipes, a monthly sweepstakes with prizes worth up to $2,000, discounts on products, and best of all a community of like-minded cooks free of flame wars. Click below to see all the benefits, take a free 30 day trial, and help keep this site alive.

Post comments and questions below


1) Please try the search box at the top of every page before you ask for help.

2) Try to post your question to the appropriate page.

3) Tell us everything we need to know to help such as the type of cooker and thermometer. Dial thermometers are often off by as much as 50°F so if you are not using a good digital thermometer we probably can’t help you with time and temp questions. Please read this article about thermometers.

4) If you are a member of the Pitmaster Club, your comments login is probably different.

5) Posts with links in them may not appear immediately.



Click for comments...


These are not ads or paid placements. These are some of our favorite tools and toys.

These are products we have tested, won our top awards, and are highly recommend. Click here to read how we test, about our medals, and what they mean.

Use Our Links To Help Keep Us Alive

A big part of this site is our unbiased equipment and product reviews. We love playing with toys and we have no problem calling them the way we see them. Some companies pay a finder’s fee if a reader clicks a link on and buys a product. It has zero impact on our reviews, zero impact on the price you pay, and the sites never tell us what you bought, but it has a major impact on our ability to keep this site alive! So before you buy, please click our links. Here’s a link that takes you to a page on Amazon that has some of our favorite tools and toys:


Comprehensive Temperature Magnet With 80+ Important Temps temperature magnet
Winner of the National BBQ Association’s product of the year award. This 8.5″ x 11″ magnet contains more that 80 benchmark temperatures for meats (both USDA recommended temps as well as the temps chefs recommend), fats and oils, sugars, sous vide, eggs, collagens, wood combustion, breads, and more. Although it is not certified as all-weather, we have tested it outdoors in Chicago weather and it has not delaminated in three years, but there is minor fading.

Click here to order.

Grilla Pellet Smoker proves good things come in small packages

We always liked Grilla. The small 31.5″ x 29.5″ footprint makes it ideal for use where BBQ space is limited, as on a condo patio.
Click here for our review on this unique smoker

Is This Superb Charcoal Grill A Kamado Killer?

The PK-360, with 360 square inches of cooking space, this rust free, cast aluminum charcoal grill is durable and easy to use. Four-way venting means it’s easy to set up for two zone cooking with more control than single vent Kamado grills. It is beautifully designed, completely portable, and much easier to set up for 2-zone cooking than any round kamado.

Click here to read our detailed review of the PK 360

Click here to order directly and get an exclusive deal

GrillGrates Take Gas Grills To The Infrared Zone

GrillGrates(TM) amplify heat, prevent flareups, make flipping foods easier, kill hotspots, flip over to make a fine griddle, and can be easily moved from one grill to another. You can even throw wood chips, pellets, or sawdust between the rails and deliver a quick burst of smoke.

Click here for more about what makes these grates so special

The Cool Kettle With The Hinged Hood We Always Wanted

Napoleon’s 22″ Pro Cart Charcoal Kettle Grill puts a few spins on the familiar kettle design. In fact, the hinged lid with a handle on the front, spins in a rotary motion 180 degrees. It’s hard to beat a Weber kettle, but Napoleon holds its own and adds some unique features to make the 22″ Pro Cart a viable alternative.

Click here for more about what makes this grill special

The Pit Barrel Cooker May Be Too Easy

The PBC has a rabid cult following for good reason. It is absolutely positively without a doubt the best bargain on a smoker in the world. Period. This baby will cook circles around the cheap offset sideways barrel smokers because temperature control is so much easier.

Click here to read our detailed review and the raves from people who own them

Masterbuilt MPS 340/G ThermoTemp XL Propane Smoker

This is the first propane smoker with a thermostat, making this baby foolproof. Set ThermoTemp’s dial from 175° to 350°F and the thermostat inside will adjust the burner just like an indoor kitchen oven. All you need to do is add wood to the tray above the burner to start smokin’.

Click here to read our detailed review