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Fieldpiece

Fieldpiece JL3RH Job Link System Flex HVACR Wireless Psychrometer Probe – 1000 ft Bluetooth Range with Flexible Wand - Supply/Return Switch - Water-Resistant - HVAC Diagnostic Tool

  • Based on 797 reviews
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Availability: Only 8 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Aug 29
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Features

  • Long-Range Wireless HVAC tool with Bluetooth connectivity up to 1000 ft gives you freedom to take accurate psychrometric readings anywhere on large HVAC/R job sites
  • Flexible Wand with Magnetic Mount: 9.25 bendable probe and sliding magnet let you position sensors securely in ducts, registers, plenums or hard-to-reach spaces
  • Full Environmental Measurements: Accurately captures dry bulb, wet bulb, relative humidity, dew point, and enthalpy to deliver complete air diagnostics and system insights
  • Rugged & Temperature-Ready Design: Built to withstand extreme environments from 40 F to 250 F; water-resistant housing protects sensors during demanding field use
  • Smart App Integration: Pairs instantly with Job Link app or SM380V/SM480V/SM382V/SM482V digital manifolds to view live data, log reports, and switch between supply/return readings effortlessly

Description

At Fieldpiece, we started with the idea that every HVACR professional in the field needs the best tools possible. It’s a simple premise, and one that we’ve held tightly to as we’ve grown into a best-in-class innovator of industry-leading tools for HVACR pros over the last 30+ years. Fieldpiece is laser-focused on creating products that empower HVACR professionals - today and tomorrow. The Job Link System Psychrometer Probe has a long flexible wand and strong sliding magnet for easy measurements anywhere on the system. Get instant live readings from ducts, plenums, registers, or grilles for accurate diagnostics. Handles extreme duct temperatures up to 250°F and as low as -40°F! Improve professionalism and increase efficiency with the Job Link App. Easily manage jobs, connect to tools and get diagnostics while on the job site. The app allows you to generate reports, reducing callbacks and allows you to work in multiple locations at one time. Learn more in this video about how you can enhance work processes and your overall jobsite experience. MR45 SM482V JL3KH6 VP87 DR82 MG44 SR47

Brand: Fieldpiece


Item dimensions L x W x H: 1.8 x 4.8 x 9 inches


Item Weight: 8 ounces


Measuring Range: -40°F to 250°F


Sensing Distance: 1000 feet


Measuring Range: -40°F to 250°F


Sensing Distance: 1000 feet


Upper Temperature Rating: 250 °F


Item Dimensions: 1.8 x 4.8 x 9 inches


Item Weight: 8 ounces


Brand Name: Fieldpiece


Model: JL3RH


UPC: 872641003364


Number of Items: 1


Manufacturer: Fieldpiece


Unit Count: 1 Count


Included Components: Meter


Part Number: JL3RH


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Aug 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Pricey but worth it
I’ve been using the Fieldpiece psychrometer for a while now, and it’s become one of my go-to tools for HVAC work. It’s quick, reliable, and gives consistent readings for relative humidity, wet bulb, and dry bulb temperatures, which makes my job a lot easier when diagnosing system performance. The interface is straightforward and easy to navigate, even if you’re in a hurry on a job site. I especially like how fast it responds compared to some older models I’ve used. The build quality feels solid, and it holds up well to everyday use in the field. Another big plus is how well it pairs with other Fieldpiece tools and apps, making it easy to log and track data when needed. That said, battery life could be a bit better if you’re using it heavily throughout the day, but it’s not a dealbreaker. Overall, it’s a dependable, professional-grade psychrometer that delivers accurate results and saves time. Definitely worth the investment if you work in HVAC or need precise humidity measurements regularly. ... show more
Reviewed in the United States on March 25, 2026 by Cjd
    • Can connect from far away
Product is amazing and it helps me get my maintenance done way quicker
Reviewed in the United States on June 28, 2026 by Braylon Lawrence
    • Great product
Perfect brand new, ordered 2 they both work as should
Reviewed in the United States on July 11, 2026 by BRENT
    • Amazing tool
Review Image by elvis parra
This tool works great. I can get a good signal from inside a insulated metal ice bin and still walk away a good distance without losing signal. The readings are very accurate and quick as well. Love this tool. It also has a very strong magnet that allows it to fit in even the smallest of places.
Reviewed in the United States on June 16, 2025 by elvis parra
    • Fantastic
Durability connectivity works great for the money. saves me a lot of steps
Reviewed in the United States on April 29, 2026 by John
    • Accurate, precise, and an integral part of any HVAC technicians toolkit
I have the entirety of the JobLink kit sans the amprobe. These are indispensable within the HVAC industry. I’ve been in the residential/light commercial HVAC industry for about 25 years, and definitely don’t miss the days of having to run back, and forth from the indoor unit to the outdoor unit, then back again. These are extremely accurate, and as others have said you can be a good distance away from the psychrometers while being your pressure measurements, and get a solid look at the system as a whole(with the SMAN4 gauges, or the JobLink charging kit). Combine the JobLink static pressure probes, and enter the CFM into the airflow section of the JobLink app, and you can get a continuous reading of BTU’s produced. These psychometric probes are a lifesaver. Especially, if you’re working on an attic system in the dead heat of summer. Aside from being extremely useful when performing maintenance, they are a great diagnostic tool, and with the length of the probe(twss) you can position it to read directly in the airstream(twss iykyk). I can’t say enough good things regarding these, or any tool that’s part of the JobLink family tools, and especially the usefulness of the Fieldpiece app. The app shows you to observe your readings for the aforementioned situation, a combination analyzer, electrically, and historical graphing. The ability to print out a PDF that you can then provide the customer proving your diagnosis, or confirming your repair work(As a qualifying statement prior to the next sentence, the following does not apply to situations where the work wasn’t performed correctly, the diagnoses was incorrect, or damage was caused to the customers home/system)is especially important in today’s world where unfortunately if you don’t document your work, and repairs it can become a he said/she said situation that can put you in a negative position where you can be the recipient of a constant flow of demands for refunds from people exploring the situation in order to get something/anything free, or in extreme cases being caught up in legal issues if you’re not able to 100% verify your work. The Fieldpiece psychometric probes are a great addition to your toolbox that will pay dividends through the future ... show more
Reviewed in the United States on August 10, 2025 by christopher m norbury
    • Works with app
Use it every day, works great.
Reviewed in the United States on December 23, 2025 by Edward Harper
    • Reliable so far.
A good probe set although having to update in front of a customer is frustrating. You are at the mercy of your smartphone and the probes both having a good connection. You cant see temperatures indoors sometimes while working on a roof. Overall if used in a certain way its still a great diagnostic tool. ... show more
Reviewed in the United States on July 31, 2026 by Jordan

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