Strain Gages Performance Introduction

Ⅰ、 Backing Glue

1、Phenolics Glue(code name: F)
After common phenolics glue is modified. It has suitable firm and soft, strong adhesion, good slice technology, lower cost and simple operation. Especially to larger positive adjustment range. After sealed, performance is more stable, adjust to great batch producing sensor's user.

2 、Epoxy Glue(code name: H)
Special epoxy backing. Features aregood firm per formance, width temp Erature rang (40~120℃). Adjustto steeling big capacity sensor and intensity of pressure sensor.

Ⅱ、 Grids Foil

1 、CuNi
Stable performance Good integrate, excellent slice technology and we lding performance. By way of heat treatment adjustment, resistor temperature coefficient attains selfcompens-ation to aluminium(23）and steel(11).It is excellent material of high precision weighing sensor.

2 、NiCr AIFe (NoCrAICu) Features:
High receptivity and sensitivity. trough heat treatment can adjust sensitivity coefficient temp. Performance, adjust to Produce 0.03-0.05level no external compensation sensor.

Ⅲ、 Elastic Modulus Self-Compensation
Elastic modulus increases with the raise of the ambient temperaturein sens or ela stic body. By way of adjusting NiCrAIFe fo il heating treatment technology, makes strain gage sensitivity coefficient K de creases with the raise of temperature, leads to coefficient K decreases with the raise of temperature, leads to and then achieves self-comp ensation. But the method only compensates 80% of elastic modulus. Lt is very suitable to 0.05 level great batch, low cost sensors.

Ⅳ、 Creep Self-Compensation
Because internal molecule of elastic body material slides and moves, it make sensor elastic body creep have minute change when value＞0. But strain gage backing glue and Adhesive have minor change because high Polymer material has sluggish effect in value＜0 range. By way of experiment, we know that changing proportion of strain gage end line to grid width may adjust strain gage minus creep value, thus compensates different to aluminum alloy elastic body. Table recommends creep compensation slice grade in different capacity sensors below.