MMC International Closed/Gas Tight Tri-Mode Electronic Gauging Tape

MMC is the world’s leading manufacturer of portable instruments for measuring ullage, oil-water interface, temperature, and bottom dryness in shipboard and land-based petroleum and chemical tank systems. All MMC systems are manufactured in the United States and are certified as intrinsically safe by Factory Mutual, BASEEFA, CSA and SAA.

The Portable Closed Flexi-Dip measuring tape is a battery-operated electronic unit that is totally gas-tight. When installed in a vapor-control valve mounted on a storage (cargo) tank, it forms a tightly sealed system that prevents toxic vapors from escaping and creates a closed gauging system for that tank. The tape is marked in metric or english units and is anti-static coated (as is the sensor). In addition, the tape is color marked to make tape direction and motion easily seen and to ensure full rewind position. A coiled grounding cable with large alligator clip is standard. This closed system is recognized by many worldwide regulatory bodies as equivalent to a fixed gauging system as long as the tape remains in the valve from the beginning until the end of loading or discharging of the tank.


Accuracy of Tape Reading: Fluid level +/- 1/8 inch (3mm), +/- 0.01% of F.S. tape LGT (F.S. = Full Scale).
Accuracy of Temperature Display: +/- 0.5 °F (+/- 0.3 °C), +/- 1 digit error.
Ambient Temperature Limits: -20 °F (-7 °C) to 120 °F (49 °C).
Product Temperature Limits: -40 °F (-40 °C) to 180 °F (82 °C).
Battery: 9-Volt Eveready # 522 or Mallory MN1604.
Tape Lengths: 50 ft. (15m), 75 ft. (25m), 100 ft. (30M).
Typical Weights: 14 lbs. (6.4 KG).
Pressure Limits: 3 psi working, 7.5 psi maximum.
Approvals: Intrinsically safe–FM, BASEEFA, CSA, SAA, NKK (Japan).


Catalog No. Temperature Scale Tape Length Description
2401TC15MCBS-B °C 15 m Closed/Gas Tight Tri-Mode
2401TC20MCBS-B °C 20 m Closed/Gas Tight Tri-Mode
2401TC25MCBS-B °C 25 m Closed/Gas Tight Tri-Mode
2401TC30MCBS-B °C 30 m Closed/Gas Tight Tri-Mode
2401TC35MCBS-B °C 35 m Closed/Gas Tight Tri-Mode


Catalog No. Temperature Scale Tape Length Description
2401TC050FFM-B °F 50′ Closed/Gas Tight Tri-Mode
2401TC065FFM-B °F 65′ Closed/Gas Tight Tri-Mode
2401TC075FFM-B °F 75′ Closed/Gas Tight Tri-Mode
2401TC100FFM-B °F 100′ Closed/Gas Tight Tri-Mode

Optional Calibration

Catalog No. Description
Tape Calibration-MMC NIST Traceable Certificate of Linearity Calibration from the manufacturer

Barrel Adapters for both Closed and Restricted gauging

Please note that when purchasing adapters, the tri-mode gauging unit must be supplied with the Standard B barrel as these adapters convert from the gauge height of the B barrel.

Catalog No. Barrel Size
A-2562-257 B to MB
A-2562-309 B to C50
A-2562-358-ANK2 B to ANK52
B-2562-267-TS-C2 B to TS C2
B-2562-262-TS-A2 B to TS A2
B-2562-356-TT B to TT
B-2562-386-TT (320 mm) B to TT (320mm)