{"product_id":"fieldpiece-jl3rh-flex-psychrometer-probe-accurate-hvac-readings","title":"Fieldpiece JL3RH Flex Psychrometer Probe - Accurate HVAC Readings","description":"\u003cp\u003eIn this review the Fieldpiece JL3RH Flex Psychrometer Probe is evaluated as a diagnostic tool for HVAC technicians who need fast, accurate humidity and temperature readings in ducts and tight spaces. The bottom line: it is best for service techs who already use the Job Link ecosystem and want a flexible, magnet-mounted probe that streams live data to BLE 4.0 devices and compatible wireless manifolds. The JL3RH stands out for its flexible wand, reliable live readings, and the convenience of direct Job Link App connectivity for on-the-job adjustments.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible wand:\u003c\/strong\u003e The long, flexible probe lets technicians reach registers, plenums and awkward duct locations without disassembling components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong sliding magnet:\u003c\/strong\u003e A powerful sliding magnet secures the probe to metal surfaces so hands-free measurements are possible while working.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLive wireless readings:\u003c\/strong\u003e Communicates directly with the Job Link App and compatible wireless SM380V and SM480V manifolds to show temperature and humidity in real time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide measurement range:\u003c\/strong\u003e Measures 0% RH to 100% RH so it handles dry to saturated conditions common in HVAC diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo transmitter required:\u003c\/strong\u003e Uses BLE 4.0 and a 2.4 GHz radio frequency for a quoted powerful 350 ft wireless range without needing an external transmitter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal hole size:\u003c\/strong\u003e Requires only a 3\/8 in hole for duct testing, reducing damage and simplifying installation for spot checks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe JL3RH is aimed at HVAC contractors and field technicians who use the Job Link system or the SMAN wireless manifolds and need a reliable psychrometer for routine diagnostics, commissioning and troubleshooting. Its probe design and magnet make it especially useful for in-duct and grille measurements where access is limited.\u003c\/p\u003e\n\u003cp\u003eTechnicians who do not use Job Link or who require integrated systems outside BLE 4.0 devices may want to consider alternate probes that match their platform. Those needing built-in logging without a paired app should verify workflows, since the JL3RH is designed to feed live data into Job Link or compatible manifolds.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAccurate humidity and temperature readings across a full 0% to 100% RH range make it versatile on many jobs.\u003c\/li\u003e\n\u003cli\u003eFlexible wand and sliding magnet greatly simplify measurements in ducts and on awkward panels.\u003c\/li\u003e\n\u003cli\u003eDirect BLE connection to the Job Link App and SM380V\/SM480V manifolds provides live readings for real-time adjustments.\u003c\/li\u003e\n\u003cli\u003eGood value and portability for HVAC professionals who need a compact, wireless psychrometer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConnectivity receives mixed feedback; performance depends on device pairing and environment, so users should test Bluetooth reliability on site.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eFlex Psychrometer Probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement range\u003c\/td\u003e\n\u003ctd\u003e0% RH to 100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eBLE 4.0, 2.4 GHz radio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless range\u003c\/td\u003e\n\u003ctd\u003eUp to 350 ft (quoted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eJob Link App, SM380V, SM480V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuct hole size\u003c\/td\u003e\n\u003ctd\u003eRequires 3\/8 in hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe JL3RH is a practical, well-built psychrometer for HVAC professionals invested in the Job Link ecosystem; it delivers accurate humidity readings, easy placement with the flexible wand and magnet, and useful live data to the Job Link App or compatible wireless manifolds, making it a good value for service and commissioning work.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the probe connect directly to the Job Link App?\u003c\/strong\u003e\u003cbr\u003eYes, the JL3RH communicates directly with the Job Link App using BLE 4.0 for live temperature and humidity readings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a transmitter required for wireless use?\u003c\/strong\u003e\u003cbr\u003eNo transmitter is required; the probe uses BLE and a 2.4 GHz radio and is quoted to have a powerful 350 ft wireless range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it work with SMAN manifolds?\u003c\/strong\u003e\u003cbr\u003eYes, it is compatible with the wireless SM380V (3-port) and SM480V (4-port) digital manifolds for combined system readings.\u003c\/p\u003e","brand":"Fieldpiece","offers":[{"title":"Default Title","offer_id":48609857732827,"sku":"B07DNJ1YFJ","price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51qzFlinAmL._SL1200.jpg?v=1778367010","url":"https:\/\/gearmusthave.com\/products\/fieldpiece-jl3rh-flex-psychrometer-probe-accurate-hvac-readings","provider":"GearMustHave","version":"1.0","type":"link"}