Liquid Column Manometers – HK Instruments MM Series


  • Field adjustable zero point calibration
  • Pressure limit stickers

The MM series liquid column manometers are engineered for HVAC/R applications. The MM series devices detect air and non-corrosive gas pressures (differential, vacuum and positive) and provide a clear analog display of the measured values. The MM series is designed with a reservoir to protect the manometer liquid from leaking into the duct during overpressure situation.

The MM series device options offer:
• level bubble


MM series devices are commonly used in HVAC/R systems for:

  • Fan, blower and filter monitoring
  • Pressure and flow monitoring
  • Pressure monitoring in cleanrooms


Accuracy MM±50: ±1 Pa
MM100: ±1 Pa
MM±100500:-100…0 Pa ±5 Pa/ 0…500 Pa ±25 Pa
MM200600: 0…200 Pa ±5 Pa / 200…600 Pa ±25 Pa
Overpressure Max pressure 200 kPa
Measuring Units Pa
Measuring Ranges -50…0…50 Pa
-20…0…100 Pa
-100…0…100 Pa
0…200…600 Pa
Operating Temperature -40…+60 °C


HK Instruments MM Series Liquid Column Manometers-DpstarGroup