Multiple Function Thermocouples

The Multi-Function Sensor (MFS) consists of a specified number of NANMAC Eroding Style ribbon Thermocouples capable of recording temperatures even while subjected to ablation, char and erosion. The thermal junctions are two-dimensional and are located at given depths within the MFS with a precision of +/- 0.001 inch. The entire gauge and housing is fabricated from the same material as that under study (whether it be an ablative or non-ablative plastic, metal or non-metal.), thereby eliminating errors due to differences in thermal and physical properties. A multitude of shapes and sizes can be made to fit any requirement (see sketches below). Typical materials used include various phenolic, graphite, glass laminates, graphite/phenolic composites, copper, steel, molybdenum and tungsten.

NANMAC invites inquiries on special thermocouples and gages for your particular applications. We have designed and built units with multiple thermocouple junctions, extremely high sensitivity, combination metal and plastic sensing tips, plus a wide variety of dimensional changes. For design, price and delivery information, send details of your particular application

The MFS provides test data used for
. Surface and in-wall temperatures subjected to high heat flux, ablation and erosion
. Char layer thickness and position
. Rate of char formation
. Rate of char removal
. Heat transfer properties
. Fusion point temperatures

WITH THE FOLLOWING SPECIFICATIONS:
. Gauge material same as test item for minimum heat, char, erosion and ablation variations
. Two-dimensional accuracy at the point of measurement
. Fast response times (low millisecond response times are typically, microsecond response can also be obtained)
. *Temperatures range to 5000°F, pressure range to 3000 PSI
. Vibration, velocity and accelerations as found in rocket nozzles, re-entry vehicles, etc.
. Virtually any size, configuration or mounting and installation can be accommodated

A short list of current applications:
. Materials research and evaluation
. Insulation and char characteristics
. Rocket insulation and re-entry shields
. Temperature monitoring and control of cooling apparatus
. Ablation, erosion and char rates
. Heat transfer and fusion point temperature of materials
. Automotive brake and clutch band research

* The NIST calibrated peak temperature for tungsten thermocouple elements is 4200 F, temperature data over 4200 F is not certified and the millivolt output signal to temperature relationship must be extrapolated by the user.