No-Stress -Strain Meter is installed in conjunction with group of strain meters in mass concrete in a special container where no external force is acting on strain gauge embedded in concrete. The data of No Stress-Strain meter is required to evaluate the strain gauge data to find out true strain.

Range : ±1500micro strain
Resolution : 1 micro strain
Material : Stainless steel
Operating temperature : -10 to 80°C
Thermistor : YSI 44055 or equivalent, 3KΩ at 25°C