Major Tech Thermo-Hygrometer (-30?C – 100?C, 0 – 100% RH)) MT667

Description

High-Performance Environmental Monitoring for Accurate On-Site Readings

The Major Tech MT667 Thermo-Hygrometer delivers fast, precise environmental measurements for temperature, humidity, dew point, and wet bulb conditions. Built with a microprocessor-controlled system, it provides instant, stable readings ideal for HVAC commissioning, site inspections, and critical environmental monitoring across commercial and industrial projects.

With ultra-fine 0.01 resolution and rapid response time, this instrument helps electricians and contractors make quick, informed decisions on-site—reducing downtime and improving job accuracy when environmental conditions matter most.

Reliable Accuracy for Compliance-Driven Trade Work

Designed for professional-grade use, the MT667 ensures dependable measurement accuracy across a wide range of conditions, from -30°C to 100°C and 0–100% RH. Whether you’re verifying humidity levels in plant rooms, checking dew point in electrical enclosures, or assessing site conditions, this tool supports compliance-focused work with confidence.

The dual display LCD with backlight allows clear visibility in low-light environments, while features like data hold, min/max recording, and overrange indication ensure you capture and retain critical readings during inspections. Built for tough site conditions, it comes housed in a durable moulded enclosure for long-term reliability.

Built for Trade Efficiency and On-Site Convenience

Engineered with contractors in mind, the MT667 simplifies environmental testing with intuitive operation and practical features that save time on the job. The wet bulb function operates like a digital sling psychrometer, giving you fast insights without manual calculations or additional tools.

Its lightweight, portable design makes it easy to carry between job sites, switchboards, plant rooms, and commercial spaces. Supplied with a carrying case and instruction manual, it’s ready for immediate use straight out of the box—helping trades stay efficient, organised, and on schedule.

Key Specs

• Temperature Range: -30°C to 100°C
• Temperature Resolution: 0.01°C
• Temperature Accuracy: ±(0.8°C)
• Relative Humidity Range: 0–100% RH
• Humidity Resolution: 0.01% RH
• Humidity Accuracy: ±(2.5% RH)
• Dew Point Range: -30°C to 100°C
• Wet Bulb Temperature: 0°C to 80°C
• Display: LCD dual display with backlight
• Functions: Min/Max, Data Hold, Overrange Indication
• Battery: 9V
• Enclosure: Moulded
• Weight: 200g
• Dimensions: 225 x 45 x 34mm
• Accessories: Carrying case, instruction manual

Ideal For

• HVAC installation and commissioning
• Electrical contractors and licensed electricians
• Building and facilities maintenance teams
• Industrial plant and equipment monitoring
• Data centres and server room environmental checks
• Commercial site inspections and compliance testing
• Laboratories and controlled environments

Shipping Weight & Dimensions

• Weight: 200g
• Dimensions: 225 x 45 x 34mm