Gecko JM Series Vibrating Wire Jointmeter

Category: Geotechnical Engineering

About this item

Seri JM dari transduser perpindahan kawat bergetar (vibrating wire) digunakan untuk mengukur pergerakan pada sambungan, retakan, serta pondasi beton, batuan, dan tanah.

Deskripsi Produk

Description

The JM series employs a vibrating wire sensor attached to a spring under tension between two anchors. Any change in distance between the anchors alters the wire tension, which is measured by the sensor housed in a sliding stainless steel casing for protection.

Models Available:

JM-S Crackmeter: Surface-mounted on structures using groutable or bolt-on anchors. Equipped with ball joints at both ends to accommodate anchor misalignment. Available in 3-D configuration for measurement in three orthogonal directions or with special clamps for geogrid installation.
JM-E Embedment Jointmeter: Embedded within concrete, spanning the construction joint. Installed in two parts (socket and sensor) during successive concrete pours.
JM-T: Designed for use with borehole extensometers.

All models include an integrated thermistor for temperature measurement.

Specifications:

Measurement Range: 25 to 300 mm (depending on model)
Overrange Capacity: 100% of range
Accuracy: ±0.25% F.S. (±0.1% optional)
Resolution: 0.02% F.S. minimum
Operating Temperature: −20°C to +80°C
Thermistor Resistance: 3 kΩ
Cable Types: IRC-41A, IRC-41AP, IRC-3902, IRC-21A (JM-T)
Dimensions vary by model and range