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Fieldpiece JL3RH Job Link® System Flex Psychrometer Probe

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Original price $135.00
Current price $114.75

Fieldpiece JL3RH Job Link® System Flex Psychrometer Probe

Products usually ship within 1 business day.

The 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 testing

Connect to Job Link App or Wireless SM380V and SM480V Digital Manifolds
You 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 freezers

Return and supply indicator switch ensures you're recording the right measurements in the correct place.

  • Dry bulb
  • Wet bulb
  • %RH
  • Dew point
  • Enthalpy

The JL3RH psychrometer probes are sold as individuals so you can use one or more at a time, or they come included in the Job Link Charge and Air Test Kit.


  • Job Link System Flex Psychrometer Probe
  • 1 Protective Slip Cover for Sensor Tip
  • 2 x AAA Batteries
  • Operator's Manual


User Manual



      Wireless Range 350 feet (107 meters) line of sight, obstructions affect distance
      Wireless Frequency 2.4 GHz
      Battery 2 x AAA (included)
      Battery Life 150 hrs typical alkaline
      Auto Power Off (APO) 2 hrs (can be disabled)
      Minimum Device Requirement BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
      Flexible Probe

      0.36" (9mm) diameter

      9.25" (235mm) length

      Best Accuracy

      ±1°F (0.6°C)

      ±2.5% RH

      Measurement Range

      -4°F to 140°F (-20°C to 60°C)

      0% RH to 100% RH