Strain and Temperature Sensors for Curved Mounting Surfaces (Model DT3715 Series)

Columbia Series DT3716 sensors were developed to precisely monitor both strain and temperature on curved mounting surfaces. These sensors have a DIN standard 1000Ω platinum RTD that delivers precise temperature measurements at the exact site of sensor attachment, in addition to the precision, robustnessand easy installation of the flight-qualified Series DTD2684 sensors.

Similar sensors have been used to monitor the expansion of the rocket body. They can also be used in several military and industrial applications that involve explosive body applications, pipe expansion measurement, aircraft surface loadand all other types of engine monitoring.

Series DT3715 sensors are tailor-made to calculate circumferential strain near the diameter of the surface on which it is mounted. That particular mounting radius is custom-made into the sensor body to offer a method of controlling operator alignment method in sensor mounting.

There are models availableto compensate for typical materials used in aircraft structural manufacturing, as well as for alternative materials as needed. The Columbia Model 5802 Strain Gage Amplifier may additionally power and signal condition the sensors’ strain and temperature outputs.

Note: Exports from the United States are subject to the Export Administration Regulations (EAR) and/or the International Traffic in Arms Regulations (ITAR) authorization procedures.

Strain & Temperature Outputs

Choice of Cylindrical Mounting Radius

Self-Temperature Compensating

Specifications

Operational

Table 1. Source: Columbia Research Laboratories, Inc.

Environmental

Table 2. Source: Columbia Research Laboratories, Inc.

Physical

Table 3. Source: Columbia Research Laboratories, Inc.

¹ @25 °C. ² Installed Gage

Schematic Diagram

Image Credit:Columbia Research Laboratories, Inc.

Typical Installation of Old Style Strain Gages.1. Bolt or rivet removed from assembly; 2. Dummy gage(s) bonded to “Z Tab” of same material as structure; 3. Active gage bonded to structure under test; 4. “Z Tab” mounted to structure with bond or rivet; 5. Strain gage leads interwired and soldered to junction block and 6. Entire unit covered with protective material. Image Credit: Columbia Research Laboratories, Inc.

Installation of Columbia Strain Sensor.1. Strain Sensor bonded to surface under test; 2. Leads connected to wire harness and 3. Coat sensor and wires with waterproofing material. Image Credit: Columbia Research Laboratories, Inc.

Ordering Information*

Table 4. Source: Columbia Research Laboratories, Inc.

* Mounting Radius Required upon Ordering.

Advantages

Twice as much output

A higher level of precision

No compromise on structural integrity

Installation time is reduced

Optimal temperature compensation