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HBWAK Series gages are constructed of self-temperature compensated K alloy wire, and bonded to a Hastelloy® X shim. Standard gages are compensated for mild steel (6ppm/°F).

K alloy is a highly corrosion resistant alloy with superior properties. Many of our customers utilize K-Alloy gages for nuclear and fossil fuel applications as well as renewable energy projects, where harsh environments cause corrosion.

Maximum operating temperature at sensor: 650°F (343°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)

Part Number

Max. Temp

Gage Length

Instrumentation Cable

HBWAK-12-250-6-FG
Data Sheet (70-705)

650°F/sensor
900°F/cable

.250″

Fiberglass Insulated

HBWAK-12-250-6-MG
Data Sheet (70-706)

650°F/sensor
1800°F/cable

.250″

Mineral Insulated/Inconel Jacket

HBWAK-35-250-6-FG
Data Sheet (70-707)

650°F/sensor
900°F/cable

.250″

Fiberglass Insulated

HBWAK-35-250-6-MG
Data Sheet (70-708)

650°F/sensor
1800°F/cable

.250″

Mineral Insulated/Inconel Jacket

HBWAK-35-250-6-FG-HB
Data Sheet (70-709)

650°F/sensor
900°F/cable

.250″

Fiberglass Insulated

HBWAK-35-250-6-FG-SHIELD
Data Sheet (70-711)

650°F/sensor
900°F/cable

.250″

3 Cond. NCC Shielded

HBWAKR-12-250-6-MG
Data Sheet (70-713)

650°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
35: 350 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)

Temp. Compensation

6: 6 ppm/°F

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)
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)

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