Fieldpiece JL3RH Job Link Wireless Flex Psychrometer Probe

The Fieldpiece JL3RH is a wireless flex psychrometer probe for HVAC technicians who need accurate dry bulb, wet bulb, dew point, and relative humidity readings in hard-to-reach duct locations. The 235mm flexible probe fits through tight register openings and plenums where rigid probes can't reach — and the magnet mount means you can leave it in place and walk away.

Key Features

• Measures: Dry bulb, wet bulb, dew point, and relative humidity (%RH)
• Probe: 235mm (9.25") flexible, 9mm diameter — fits tight duct openings and registers
• Accuracy: ±1°F (±0.6°C) temperature, ±2.5% RH (10–90% RH)
• Range: -20°C to 60°C, 0–100% RH
• 100m+ wireless range: Via Fieldpiece Job Link™ Bluetooth
• Magnet mount: Hands-free positioning in ducts and air handlers
• Battery life: ~150 hours on 2 × AAA batteries (included)
• Auto-off: After 2 hours (can be disabled in app)
• BLE 4.0+ compatible: Works with the Job Link™ app on iOS and Android

Job Link™ System Compatible

The JL3RH integrates with the full Fieldpiece Job Link™ ecosystem for live air quality monitoring, data logging, and job reporting. Pair with the SM480VINT digital manifold for complete system commissioning data in one view.

Related Products

Browse all Fieldpiece HVAC tools and our full range of Bluetooth smart tools. For a complete wireless commissioning kit, see the Fieldpiece JL3KH6 Charge & Air Test Kit.

Ships Australia-wide from our Australian warehouse. Contact us for trade pricing.