NIHON DOKI - Circumference Tape (PI Measure)
Brand: Nihon Doki

Standard Specification

Housing:	*without case, but only πM-100 * π M-200, πM-300 are each in a special Aluminium case.
Tension:	*Standard tension: 10N at 20℃
Graduation:	*Diameter tape is calibrated by 0.2mm, and Circumference tape by 1.0mm

 
Tape Width: 7.0mm (Reading Part: 14mm)

Tape Thickness: 0.1mm (original tape before etching)

Tape Material: (π M) Black Steel Tape ; Tape material: SK-5 steel.

Note:

π M-31S . 31S II, π M-51S . 51S II : Diameter Calibration only

π M-31 . 51. 100 . 200 .300 : Both Diameter and Circumference Calibration

 
Model Numbers:

Model No	Measuring Range (Diameter)	Measuring Range (Circumference)	Remark
π M-31S	30 mm ~ 100 mm	N/A (Not Available)
π M-31S II	30 mm ~ 100 mm	N/A (Not Available)	Opposite
π M-31	30 mm ~ 100 mm	100 mm ~ 310 mm
π M-51S	30 mm ~ 160 mm	N/A (Not Available)
π M-51S II	30 mm ~ 60 mm	N/A (Not Available)	Opposite
π M-51	30 mm ~ 160 mm	100 mm ~ 510 mm
π M-100	30 mm ~ 330 mm	100 mm ~ 1000 mm	With Case
π M-200	30 mm ~ 650 mm	100 mm ~ 2000 mm	With Case
π M-300	30 mm ~ 1000 mm	100 mm ~ 3000 mm	With Case