High-precision 100 mm vane probe head, including temperature sensorCombine the probe head with the handle adapter for air velocity probes and simply plug onto the handle with cable or Bluetooth. For convenient measurements at ceiling outlets, we recommend the extendable telescope for air velocity probes including 90 angle. Note: Please note that you need the handle adapter (order number 0554 2160) to use this probe head in conjunction with the handles.