Check Line Instruments ETMP-500 Tension Meter

The Check-Line ETMP-500 Limited‑Access Digital Tension Meter is a compact, pins-equipped instrument designed to measure running tension in yarns, fibers, and other slender filaments where access to the run is restricted. It covers a 1–500 g range (centiNewton, cN, is the standard calibration unit; gram calibration is available as an option) and uses a strain‑gauge bridge for precise readings that can be viewed or captured via multiple outputs. The meter offers NORMAL and DAMPED measuring modes, a HOLD function, and PEAK mode to retain peak readings, with a three‑roller head that can use ceramic pins for high‑speed filament runs up to 5000 m/min. A long‑life 9‑V lithium battery (included) powers the device for roughly 100 hours of typical use, and the complete outfit ships in a foam‑fitted carrying case with the meter, battery, and instruction manual. Key specs include a maximum sensing‑roller displacement of 0.5 mm, minimum access space of 3/4" × 1" (20 × 26 mm), operating temperature range of 40–115°F (5–45°C), and relative humidity limit of 95%, with thermal drift at 0.25% of full scale per degree C and an automatic zero at ±20% of range. The unit provides analog 0–22 V DC output for recorders, a digital parallel printer interface, and optional remote display, with a 100 Hz scanning rate (40 Hz in PEAK mode) and a natural frequency of 250 Hz for responsive, stable readings. The ETMP‑500 is the “with pins” variant of the ETM family, designed for precise tension checks in limited‑access installations.