Vaisala HM‑34 Thermo‑Hygrometer

Clearance Item

Limited quantities remaining – once they’re gone, they’re gone!

The Vaisala HM-34 is a handheld humidity and temperature meter that sets the standard for measurement tools in the restoration industry.

Fast and easy-to-use
In measurement mode, the extendable probe just slides out. Normally, measurement takes only a few seconds. The HM34 meter includes a HOLD button which allows the user to retain an RH or T measurement until it has been noted or recorded.

If no buttons are pressed for three minutes, the unit automatically switches itself off. This automatic POWER-OFF function prevents the possibility of accidental discharge of the HM34’s battery.

After the measurement is completed, the probe is slid back into the meter casing. Between spot checks, the meter is normally stored in its carrying case.

Features/Benefits:

• Ideal for spot checking humidity levels
• Measurement range 0 to 100 %RH
• The fastest response with ±2% accuracy
• Temperature measurement range -4 to 140°F
• Lightweight and pocket-sized
• Incorporates Vaisala HUMICAP® Sensor that provides high accuracy, excellent long-term stability, neglible hysteresis, and insensitivity to dust and most chemicals
• Extendable probe
• Automatic POWER-OFF
• Each unit comes with a 9V battery and a carrying case

Technical Data:

• Relative humidity:
  • Measurement range: 0 to 100 %RH
  • Accuracy: ±2%
  • Resolution: 0.1 %RH
  • Temperature dependence: ±0.04 %RH/°C
  • Response time (90%): 5 s with plastic grid
• Temperature:
  • Range: -4 to 140°F
  • Accuracy: ±.5°F
• General:
  • Display: 3 1/2 digit LCD
  • Hold function: Push-button hold of displayed value
  • Power supply: 9 V battery
  • Battery operation time: 50 hours
  • Operating temperature range: -4 to 140°F
  • Housing: ABS Plastic