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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 737 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, May 5
Order within 23 hours and 45 minutes
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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

Fieldpiece JL3RH - Job Link System Flex Psychrometer ProbeThe JL3RH 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. A flexible wand with a powerful sliding magnet provides quick and easy measurements anywhere on the system. Place in critical locations based on system needs Requires only 3/8 hole for duct testingConnect to Job Link App or Wireless SM380V and SM480V Digital ManifoldsYou can connect your psychrometers directly to both the Job Link app and the wireless SMAN Refrigerant Manifolds (3-port SM380V or 4-port SM480V) to see live air temperatures readings while you're making adjustments to the system. Data log results in the manifolds, or include in Job Link System reports. 350' wireless signal with no transmitter required Powerful enough to go through most walk-in coolers and freezersReturn and supply indicator switch ensures you're recording the right measurements in the correct place. Dry bulb Wet bulb %RH Dew point EnthalpyThe JL3RH psychrometer probes are sold individually so you can use one or more at a time, or they can be purchased as part of the JL3KH6 Job Link Charge and Air Test Kit. Please note, the JL3RH is one probe.

Product Dimensions: ‎1.8 x 4.8 x 9 inches


Item Weight: ‎8 ounces


Manufacturer: ‎Fieldpiece


Item model number: ‎JL3RH


Batteries: ‎2 AAA batteries required. (included)


Date First Available: ‎June 11, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 5

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • 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
    • Solid tool
Great proves pretty accurate
Reviewed in the United States on February 1, 2026 by Patrick J.
    • Great tool very helpful
These pscyrometers are extremely accurate really good value here if you need them quickly. Super durable. All readings compiled in the app on your phone
Reviewed in the United States on June 15, 2025 by Nathaniel
    • They work
Very helpful for charging piston equipped systems as this and the gauges with the app allow for superheat calculations on the app. The only downside I have found is that the app will not work without phone service. The tool itself is fine.
Reviewed in the United States on October 30, 2024 by Joseph James
    • Works with app
Use it every day, works great.
Reviewed in the United States on December 23, 2025 by Edward Harper
    • Calidad y garantia
Excelente producto, fieldpiece no defrauda y conprado por aqui fue una bendicion poderlo comprar a un buen precio
Reviewed in the United States on December 21, 2025 by Carlos Zapata
    • Must have HVAC item
This is a must have if you're using job link. Great for taking Delta T while simultaneously taking your pressure readings while outside definitely keep you from having to walk back and forth when checking the system.
Reviewed in the United States on February 21, 2025 by Eliyah
    • Small Caveat
It’s a great product. It is dependent upon your smart device. There is no info screen on the device itself. If you lose connection, you are back to old school. It is a great little tool regardless.
Reviewed in the United States on August 13, 2025 by hms

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