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HBWAPT Series strain gages are constructed with a platinum-tungsten alloy that has excellent high temperature oxidation resistance, and low, stable temperature coefficients of resistance.

These high temperature strain gages are an excellent choice to measure the stress distribution and fatigue life of turbine blades in rapidly rotating turbo jet engines. Other uses include test and failure analysis in many automotive and aerospace applications.

Maximum operating temperature at sensor: 1900°F (1038°C)
Strain Type: Dynamic
Gage Resistance (nominal): 120 Ohms
Gage Factor: 4.0

Maximum operating temperature at cable:
(FG) Fiberglass Insulated – 900°F (482°C)
(MG) Mineral Insulated/Inconel Jacket – 1800°F (980°C)
(CB) Ceramic Braid Jacket – 1800°F (980°C)

Part Number

Max. Temp

Gage Length

Instrumentation Cable

Data Sheet (70-715)



Ceramic Braid

Data Sheet (70-716)



Mineral Insulated/Inconel Jacket

Standard gage configurations can be customized for individual applications
Choose options from the table below for high temperature weldable gages

Gage Resistance

12: 120 Ohms

Sensor Length

125: 1/8″ active grid
250: 1/4″ active grid
063: 1/16″ active grid

Pre-Curved Shims

Hoop (Circumferential)
Axial (Longitudinal)

Gage Alloy

H: Hoskins™ (iron, chrome, aluminum) for static strain measurements
K: K alloy (Evanohm) (nickel, chrome, aluminum, iron) for static strain measurements
NV: Nichrome V (nickel, chrome) for dynamic strain measurements
PT: Platinum-Tungsten for dynamic strain measurements


QB: Quarter Bridge – One active element
HB: Half Bridge – One active element and one compensating element, unstrained on coupon (available on H and K type gages only)
R: Rosette – Three active elements placed at three different angles. Most commonly 45° and 60°

Instrumentation Cable

CB: Chromel/Alumel Wire – Ceramic Braid Jacket – Maximum operating temperature: 1800°F (980°C)
FG: Fiberglass Wrapped Stranded NCC Conductors – Maximum operating temperature: 900°F (482°C)
MG: MgO Mineral Insulated Cable – Inconel Jacket – Maximum operating temperature: 1800°F (980°C)