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ZEF - ZED Economical, Limited Access Digital Tension Meter

Made in Germany
ZEF ZED Digital Tension Meter
Click images to enlarge.
Replaced by new ZEF and ZED models

4 capacities, 50, 100, 200 and 500 grams / cN

The new CHECKLINE models ZEF and ZED Tension Meters employ a strain-gauge system for accurately measuring the running line tensions on a wide variety of yarns, fibers and fine wires. Its trigger-operated roller shifting mechanism makes it easy to acquire the running material.

Automatic zero permits operation in any orientation while maintaining the highest accuracy.


  • Easy-to-read LCD display with auto power off
  • Powered by rechargeable Lithium Polymer battery, 80 hr battery life with 3.5 hr charge with Universal voltage AC-Charger
  • Supplied in an attractive foam-fitted carrying case
  • Simple 2-key operation
  • ZEF V-grooved guide rollers are rated for speeds up to 900 m/min, or optionally, 2000 m/min
  • ZED V-grooved guide rollers are rated for speeds up to 2000 m/min, or optionally, 3500 m/min
  • NIST-Traceable Calibration optionally available
  • Automatic ZERO in all positions
  • User adjustable DAMPING to average-out tension fluctuations

Tension Ranges

ModelRangeFactory Calibration Material
ZEF Models
ZEF-50-G0.5 - 50.0 gramsPA: 0.12 mm diameter
ZEF-50-CN0.5 - 50.0 cNPA: 0.12 mm diameter
ZEF-100-G0.5 - 100.0 grams
ZEF-100-CN0.5 - 100.0 cNPA: 0.12 mm diameter
ZEF-200-G1 - 200 gramsPA: 0.12 mm diameter
ZEF-200-CN1 - 200 cNPA: 0.12 mm diameter
ZED Models
ZED-200-G1 - 200 gramsPA: 0.20 mm diameter
ZED-200-CN1 - 200 cNPA: 0.20 mm diameter
ZED-500-G1 - 500 gramsPA: 0.20 mm diameter
ZED-500-CN1 - 500 cNPA: 0.20 mm diameter
1. 50 & 100 g/cN models are calibrated using a 0.12 mm diameter monofilament,
200 & 500 g/cN are calibrated with 0.20 mm.
2. Custom calibration with customer-supplied samples is optionally available. Inquire


ZEF Models
Miniature rollers make these models ideal for delicate yarns/fibers and fine wires as well as those application where access space is limited.

For Spandex and similar materials, specify model ZEF-50-T.
ZED Models
This model is recommended for all other applications where miniaturized rollers are not necessary

Complete Kit

All models are supplied in a foam-fitted carrying case with worldwide AC-Charger with interchangeable multi-plug adapters



Measuring PrincipleStrain Gauge
Accuracy±1% Full Scale, ±1 digit (Typical, ±0.5% Full Scale)
Outer Roller DistanceZEF: 22mm (c:c)
ZED: 38mm (c:c)
Over range Readings10% Full Scale
Over range Protection200% Full Scale
Sensing Roller Deflection0.5mm (maximum)
Display Type3-Digit LCD, 11mm height
Display Update Rate0.5 seconds (2 times/second)
Natural Frequency250 Hz
DampingUser-Selected Electronic Damping (moving average)
Signal ProcessingDigital via 12-Bit A/D Converter
Auto Zero±20% Full Scale
Temperature CoefficientLess than ±0.01% FS/ °C
Auto Power Off
Battery TypeLithium Ion, rechargeable - PN E08710
Battery Life80 Hours Continuous Use (Approx), 3-1/2 Hour Charging Time
Roller MaterialHard-coated Aluminum (standard)
POM Plastic (Optional), specify suffix "-T"
Max Linear Speed ZEF900 m/min (standard)
2000 m/min (optional), specify suffix "-K"
450 m/min (option "T")
Max Linear Speed ZED2000 m/min (standard)
3500 m/min (optional), specify suffix "-K"
Operating Temperature50 to 100° F (10 to 45°C)
Ambient Humidity85% RH, max
Housing MaterialHigh-Impact Plastic (POM)
Dimensions6.2 x 3.3 x 1.3" (157 x 85 x 32 mm)
Weight200 grams (Approx.)
Battery Chargerp/n K50205 (for serial numbers up to 4499)
p/n K50206 (for serial numbers over 4500)
USB AC adapter for use on 100-240V AC with 4 adapters (EU/USA/UK/AUS-NZ)


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