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HBWAH Weldable Strain Gages are constructed of an iron chrome aluminum alloy (Hoskins 875 ™) providing high resistivity and very good oxidation resistance.

Recommended for high temperature static measurements where a compensating gage, a half bridge or full bridge configuration is used.

Maximum operating temperature at sensor: 1800°F (980°C)
Strain Type: Static
Gage Resistance (nominal): 120 Ohms
Gage Factor (nominal): 2.0

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)
HBWAH-HB-photo

Part Number

Max. Temp

Gage Length

Instrumentation Cable

HBWAH-12-125-6-FG-HB
Data Sheet (70-722)

1800°F/sensor
900°F/cable

.125″

Fiberglass Insulated

HBWAH-12-250-6-FG-HB
Data Sheet (70-710)

1800°F/sensor
900°F/cable

.250″

Fiberglass Insulated

HBWAH-12-250-6-MG-HB
Data Sheet (70-712)

1800°F/sensor
1800°F/cable

.250″

Mineral Insulated/Inconel Jacket

HBWAHR-12-125-6-MG-GP
Data Sheet (70-714)

1800°F/sensor
1800°F/cable

.125″

Mineral Insulated/Inconel Jacket

HBWAHC-12-250-X-MG-HB
Data Sheet (70-717)

1800°F/sensor
1800°F/cable

.250″

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

Temp. Compensation

6: 6 ppm/°F

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

Configurations

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)
LHB: Half Bridge – One active element and one compensating element without coupon
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)