Fieldpiece ATH4
Dual-Temperature Accessory Head

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Fieldpiece ATH4 Shown
Product Information
Manual 865 KB PDF Datasheet
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  • Measures Temp and RH%
  • Calculates wet bulb and dew point temperatures
  • Get outdoor dry bulb and indoor wet bulb for target superheat calculations
  • Log relative humidity over time and troubleshoot systems
  • English and Metric units
  • Auto Power-Off (APO) to extend battery life, with override switch for data logging and extended test times

The Fieldpiece ATH4 Dual-Temperature Accessory measures two temperatures simultaneously using the included k-type, wrap tab beaded thermocouples. The technology inside the Fieldpiece ATH4 provides superior temperature compensation in rapidly changing environments commonly found while performing field service. Use the Fieldpiece ATH4 to find Delta T and just about any temperature split you want to measure. The Fieldpiece ATH4 displays T1, T2 and T1-T2 on your Fieldpiece meter, handle or data The Fieldpiece ATH4 is included with the HVAC Guide System Analyzer to get target superheat and for the Target Evaporator Exit Temperature test. Fieldpiece offers a wide variety of k-type thermocouples for various HVAC specific applications.

Outputs: Switchable: T1, T2, T1-T2, standard male banana plugs
Calibration: Two externally adjustable pots
Conversion rate: 1mVDC per 1°
Range: -50 to 1800°F (-46 to 982°C)
Resolution: 0.1° for meters with 0.1mVDC
Battery: Standard 9V
Battery life: 200 hours continuous
Auto-off: After 15 minutes
LED indication: green for "On", red for low battery
Max input voltage: 60 VDC, 24 VAC
Operating temp: -30 to 120°F (-34 to 49°C)
Storage temp: -4 to 140°F (-20 to 60°C)
Probe insulation: Teflon, to 500°F (260°C)
System accuracy: at 75°F ± 5°F (24°C ±3°C) ambient, after ice bucket calibration:
±1°F, -50 to 165°F (±0.5°C, -46 to 73°C)
±2°F, 165 to 350°F (±1°C, 74 to 176°C)
±3°F, 350 to 1700°F (±2°C, 176 to 926°C)
Converter accuracy: ±0.5%+3.6°F (2°C), -50 to 1800°F (-46 to 982°C)
Thermocouple accuracy: ±4°F (±2°C) or ±0.75%, whichever is greater, -30 to 1500°F (-34 to 815°C)
Ordering Information
Model Description Buy Online Price
ATH4  Fieldpiece ATH4 Dual-Temperature Accessory Head Buy Now Sale $63.20
(Reg. $79.00)
Included Accessories
  • 2 - K-type wrap tab bead thermocouples - (ATB1)
  • 2 - Velcro Tie- wraps
  • 1 - Mini-calibration screwdriver
  • 1 - 9V battery (installed)
  • 1 - Operator’s manual