Mastercool 98061 Electronic Thermocouple Vacuum Gauge — Programmable Target Vacuum
The Mastercool 98061 is a handheld thermocouple vacuum gauge designed for HVAC/R technicians who need accurate, field-durable vacuum measurement during system evacuation. It uses thermocouple sensor technology — which Mastercool notes is more accurate and durable than thermistor-type sensors, and less susceptible to damage from small oil mists — in a compact handheld format rather than a cumbersome tabletop unit.
A programmable target vacuum range with a light sensor indicator allows you to set your target micron level and continue other work while the gauge monitors evacuation progress — the indicator light signals when your target vacuum has been reached. The unit also supports self-calibration in the field.
Important: System evacuation and refrigerant handling requires appropriate trade qualifications. Confirm licensing and compliance requirements with the relevant authority in your state or territory before undertaking refrigerant work.
Key Features
- Thermocouple sensor — more accurate and durable than thermistor type; resistant to small oil mists
- Programmable target vacuum range with light sensor indicator
- Self-calibration capability for field use
- Measuring range: ATM to 1 micron (confirm against datasheet)
- Accuracy: ±10% (ATM–1,000 microns) | ±7% (1,000–100 microns) | ±5% (100–1 micron)
- Response time: 250ms
- Spiral sensor cable — extends to 6.5 feet (2.6 metres)
- Connection fitting: 1/4" flare female adapter
- Power: 9V DC battery (AC/DC adapter optional)
- Battery life: 36 hours
- Low battery indicator
- Vacuum units: micron, Torr, mTorr, mmHg, mBar, Pa
- 12-month manufacturer’s warranty
Best For
- HVAC/R technicians who want to set a target vacuum and monitor progress without standing at the gauge
- Technicians who prefer thermocouple sensor technology for durability and oil mist resistance
- System evacuation on residential and commercial AC and refrigeration systems
Check Before Ordering
- Connection fitting is 1/4" flare female adapter — confirm compatibility with your vacuum pump and system service ports
- Confirm full measuring range and accuracy against the Mastercool 98061 datasheet for your application
- Optional AC/DC adapter (99334-110) available separately — confirm availability at time of purchase
- System evacuation requires appropriate trade qualifications — confirm licensing requirements in your state or territory
- Warranty: 12 months — confirm current terms at time of purchase
Frequently Asked Questions
What is the advantage of thermocouple over thermistor sensors?
Mastercool states thermocouple sensors are more accurate and durable than thermistor-type sensors, and less susceptible to damage from small oil mists encountered during refrigerant system evacuation. Confirm suitability for your specific application.
How does the programmable target vacuum work?
You set your target micron level on the gauge. The light sensor indicator signals when the system reaches your target vacuum — allowing you to continue other work without monitoring the display continuously.
What is the warranty?
12-month manufacturer’s warranty. Confirm current terms with HVAC Trade Supply at time of purchase.
Browse our full vacuum gauge range or contact our team for advice.