Engineered for versatility, the TT-300 Series offers multiple models including TT-300, TT-300A, TT-310, TT-320, and TT-340. Each model delivers precision ultrasonic testing with high repeatability and wide measuring ranges, making them suitable for manufacturing, pipeline, and maintenance industries where accurate wall thickness verification is essential.

CV Instruments Thickness Gauge - TT-300 Series

Compact, lightweight, and user-friendly, the TT-300 Series combines portability with powerful measurement functions. Features such as variable sound velocity adjustment, durable construction, backlit LCD display, and extended temperature tolerance (up to 300 °C in TT-300A) ensure reliability in both standard and challenging inspection environments.

Features

Wide Measuring Range

Models measure from as low as 0.75 mm up to 225 mm in steel, with options for high-temperature and cast iron.

High Accuracy

Tolerance from ± 0.5% H + 0.01 mm to ± 1% H + 0.1 mm, ensuring precise results in varied applications.

Flexible Resolution

Selectable display resolutions of 0.1 mm / 0.01 mm (0.01″ / 0.001″) depending on model.

Data Output

RS232 connectivity available for printing or PC data transfer on supported models.

Rugged & Portable

Lightweight (as low as 250 g), powered by two AA batteries lasting up to 100 hours, suitable for field use.

Overview

Model	TT-300	TT-300A	TT-310	TT-320	TT-340
Measuring Range (Steel)	1.2 – 225.0 mm	0.75 – 225.0 mm	1.2 – 225.0 mm	1.2 – 225.0 mm	1.2 – 225.0 mm
Other Ranges	5.0 – 80.0 mm (high-temp steel)	—	5.0 – 40.0 mm (cast iron)	—	—
Tolerance	± 1% H + 0.1 mm	± 0.5% H + 0.01 mm	± 1% H + 0.1 mm	± 1% H + 0.1 mm	± 1% H + 0.1 mm
Lower Limits (Steel Pipes)	≥ Φ20 mm × 3.0 mm	≥ Φ20 mm × 3.0 mm	≥ Φ15 mm × 2.0 mm	≥ Φ20 mm × 3.0 mm	≥ Φ20 mm × 3.0 mm
Display Resolution	0.1 mm / 0.01 mm (0.01″ / 0.001″)	0.1 mm / 0.01″	0.1 mm / 0.01 mm	0.1 mm / 0.01 mm	0.1 mm / 0.01 mm
Data Output	RS232 (printer/PC)	—	RS232 (printer/PC)	RS232 (printer/PC)	RS232 (printer/PC)
Sound Velocity Range	1000 – 9999 m/s	1000 – 9999 m/s	1000 – 9999 m/s	1000 – 9999 m/s	1000 – 9999 m/s
Power Supply	2 × AA (1.5 V)	2 × AA (1.5 V)	2 × AA (1.5 V)	2 × AA (1.5 V)	2 × AA (1.5 V)
Battery Life	~100 hours (without backlight)	~100 hours	~100 hours	~100 hours	~100 hours
Units	mm / inch	mm / inch	mm / inch	mm / inch	mm / inch
Operating Temperature	–10 °C to +60 °C	–10 °C to +300 °C	–10 °C to +60 °C	–10 °C to +60 °C	–10 °C to +60 °C
Dimensions	152 × 74 × 35 mm	152 × 74 × 35 mm	152 × 74 × 35 mm	152 × 74 × 35 mm	152 × 74 × 35 mm
Weight	370 g	250 g	370 g	370 g	370 g