Mastercool 98061 digital vacuum gauge – thermocouple accuracy in your hand

Need a reliable and accurate way to confirm your system has reached deep vacuum? The Mastercool 98061 handheld vacuum gauge combines lab-level precision with rugged field-ready performance—no more bulky tabletop setups or fragile sensors.

What you'll find on this page

• ✅ Why thermocouple sensor technology?
• ✅ Smart design for busy HVAC techs
• ✅ Key specifications
• ✅ Optional accessories

Why thermocouple sensor technology?

Thermocouple sensors are known for being more accurate and durable than thermistor types, especially in real-world field conditions. This means fewer false readings, longer tool life, and less frustration on the job.

• ✅ Accurate across a wide range of vacuum levels
• ✅ Resistant to oil mist contamination
• ✅ Self-calibrating to maintain accuracy in field conditions

Smart design for busy HVAC techs

This handheld unit allows you to program your target vacuum range. A built-in light sensor alerts you when your desired vacuum is reached—so you can keep working while the system pulls down.

• ✅ Spiral sensor cable extends up to 6.5 feet (2.6m)
• ✅ 1/4" flare female adapter fitting
• ✅ Large digital display with multiple vacuum units
• ✅ Micron, Torr, mTorr, mmHg, mBar, and Pascal readouts
• ✅ Low battery icon and hold/target indicators

Key specifications

This unit delivers fast, accurate readings across a broad vacuum range—ready for deep vacuum pull-downs in residential, commercial, and automotive HVAC work.

• ✅ Response time: 250 milliseconds
• ✅ Operating temperature: 0–45°C (32–120°F)
• ✅ Accuracy range: up to ±5% of reading below 100 microns
• ✅ Power: 9V battery (36 hours runtime)
• ✅ Packaged in a blow-moulded case

Optional accessories

Need replacements or extras? We’ve got you covered with official Mastercool accessories designed for this unit.

• ✅ 98061-SENSOR – Replacement thermocouple sensor
• ✅ 99334-110 – 110V AC/DC power adapter
• ✅ 99333 – 1/4" FL-M x 1/4" FL-M x 1/4" FL-F tee

Take the guesswork out of deep vacuum testing. The Mastercool 98061 digital vacuum gauge is your reliable companion on every job.