MM

Liquid column manometers

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.

MM series device features include:
• field adjustable zero point calibration
• pressure limit stickers

The MM series device options offer:
• level bubble

 

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Applications

Liquid column manometers are reliable and inexpensive traditional pressure meters. The  manometers are good for measuring and indicating small overpressure, underpressure and differential pressure of air and non-aggressive gases in low pressure ranges.

Liquid column manometers are ideal for general-purpose work in air-conditioning and ventilation, monitoring of air filters for contamination and monitoring of airflow and air velocity.

Specifications

Performance

Accuracy:
MM-0202     ±0.004 inWC
MM-04         ±0.004 inWC
MM-0420
-0.4–0 inWC     ±0.02 inWC
0–2.0 inWC      ±0.1 inWC
MM-00824
0–0.8 inWC        ±0.02 inWC
0.8–2.4 inWC     ±0.1 inWC
Overpressure:
Max Pressure: 800 inWC (200 kPa)

Technical Specifications

Media Compatibility:
Dry air or non-aggressive gases
Measuring units:
inWC
Measuring ranges:
-0.2–0–0.2 inWC
0–0.4 inWC
-0.4–0–2.0 inWC
0–0.8–2.4 inWC
Environment:
Operating temperature:
-40–140 °F (-40–60ºC)
Gauge fluid:
Red: s.g. 49.068 lb/ft3 (0.786 kg/dm3) (15 °C)
(Isopar M)
MM-0202 RED
MM-04 RED
MM-0420 RED
MM-00824 RED

Physical

Materials:
Case: ABS
Cover: PMMA
Knobs: Polycarbonate (PC)
O-ring: Nitrile rubber (NBR)
Weight:
14.82 oz (420 g)

Safety

Product equipped with integral reservoir to prevent gauge fluid leakage during overpressure situation.

Product is tested and meets the NRTL product approval
requirements.

 

Model summary

Description Model# Part# Measurement range (inWC)
inclined/vertical
Liquid column manometer MM-0202 10104 -0.2-0 / 0-0.2
Liquid column manometer MM-04 10105 0-0.4 / NA
Liquid column manometer MM-0420 10106 -0.4-0 / 0-2.0
Liquid column manometer MM-00824 10107 0-0.8 / 0.8-2.4