Hydronic Manometer HM675 TSI

Hydronic Manometer HM675 TSI

Precision Instrument for Balancing Hydronic Heating and Cooling Systems

The TSI Hydronic Manometer HM675 is a high-performance instrument designed to accurately balance hydronic heating and cooling systems, verify pump performance, and set balancing valves. Engineered for reliability and ease of use, the HM675 allows simultaneous display of differential, high-side, and low-side pressures—without the need for switching hose connections or changing valve positions.

With its wide pressure measurement range and robust construction, this manometer is suitable for both field and mechanical room use. The large backlit display ensures readability in low-light environments, while multiple pressure units and temperature probe inputs provide the versatility required by HVAC professionals.

Features and Benefits

• Simultaneously measures and displays differential, high-side, and low-side pressure

• No need to change hose connections or instrument valve settings during use

• Accepts input from two temperature probes for additional diagnostic capability

• Large, easy-to-read backlit display ideal for dimly lit environments

• Robust splash-proof case for field durability

• Operates on four AA alkaline or NiMH rechargeable batteries

• Reads multiple pressure units: in. H₂O, ft. H₂O, psi, in. Hg, mm H₂O, kPa, mm Hg, and bar

• Fast response and high accuracy for critical balancing tasks

Applications

• Balancing hydronic heating and cooling systems

• Checking and validating pump performance

• Setting and verifying balancing valves

• Troubleshooting HVAC system flow and pressure discrepancies

• Commissioning and maintenance of mechanical systems

Specifications

• Model Number: HM675

• Differential Pressure Range: ±300 psi (±2068 kPa)

• Gauge Pressure Range: -20 to 300 psi (-138 to 2068 kPa)

• Display: Large, backlit LCD

• Units of Measurement: in. H₂O, ft. H₂O, psi, in. Hg, mm H₂O, kPa, mm Hg, bar

• Battery Type: 4 x AA (alkaline or NiMH rechargeable)

• Weight: 2.65 lbs (1.20 kg)

• Casing: Splash-proof and rugged for field use

Kit Includes

• Hydronic Manometer HM675

• Hard carrying case

• Two 6.7 ft (2 m) x 1/4 in. (6 mm) hoses with shut-off valves

• Two B&G readout probes

• Two P/T gauge adapter probes

• Power cord

The HM675 Hydronic Manometer delivers precise performance and reliable operation, making it an indispensable tool for HVAC technicians, mechanical contractors, and commissioning agents working in modern hydronic systems.