Best performance thermometer in its price range
  • Battery packs available
  • Best price/performance package
One of Fluke Calibration’s best-selling products is the Tweener thermometer, and there’s a reason. No other company, not one, has a reference thermometer that comes close to the performance and features of the Tweener for anywhere near its price.


  • Accuracy: ≤ 2.2 mm @ 30 m (≤ 3/32 in @ 100 ft)
  • Working range: ≤ 30 m (100 ft)
  • Working range with XLD: ≤ 300 m (1000 ft)
  • 1-meter drop tested
  • IP67 certified protected from dust and immersion in water with a depth of up to 1 m (or 3.3 ft) for up to 30 minutes


  • IP 67 waterproof & dustproof protection, completely sealed for use in harsh environments
  • Designed to withstand 3 meter drop (with holster)
  • Unique function for accurate voltage and frequency measurements on adjustable speed motor drives and other electrically noisy equipment
  • MSHA approval
  • Limited lifetime warranty


  • Test the grounding components of equipment in hard-to-reach spaces, including areas that are indoors or fully paved and do not permit driving auxiliary test stakes.
  • AC Leakage Current Measurement: Identify AC leakage without disconnecting your earth ground stake from the grounding system
  • Rugged: Heavy-duty clamp jaw stays in alignment and calibration on tough jobsites
  • Logging measurement: Saves up to 32,760 measurements in memory


  • mA precision loop calibrator that communicates with and tests HART smart instruments
  • Features best-in-class accuracy at 0.01% reading
  • Provides intuitive user interface with Quick-Set knob for fast setup
  • Includes built in selectable 250 Ω resistor for HART communication
  • Features 24 V DC loop power with mA measure mode (-25% to 125%)