KFLB Low-temperature Foil Strain Gages

The gage element is made of NiCr alloy, which exhibits excellent characteristics under low-temperature environments and is sandwiched between polyimde films. Thus, the KFLB series gages are suitable for strain measurement of tanks and vessels containing low-temperature liquids such as LNG and LPG.

Description

Major Properties
Materials Resistive element NiCr alloy foil
Materials Base Polyimide
Operating temperature in combination with major adhesives after curing (°C) EP-270: -269 to 30ºC
PC-600: -269 to 150ºC
CC-33A: -196 to 120ºC
Operating temperature in combination with major leadwire cables (°C) Polyester-coated copper wire: -196 to 150ºC
Mid-temperature cable (L-11, L-12): -100 to 150ºC
Fluoroplastic-coated high/low-temp. 3-wire cable (L-3): -196 to 150ºC
Self-temperature-compensation (°C) -196 to 50ºC
Applicable linear expansion coefficients (×10-6/℃) 11, 16, 23
Strain limits at normal temp. (approx. %) 2.2
Fatigue lives at normal temp. (times) 1×106 (±1500 μm/m)
Types, lengths and codes of lead-wire cables pre-attached to KFLB
Model 2 polyester-coated copper wires 3 polyester-coated copper wires Mid-temperature 2-wire cables Mid-temperature 3-wire cables Fluoroplastic-coated high/low-temp. 3-wire cable
Gage Pattern C1, D25
15 cm N15C2 N15C3 R15C2 R15C3 F15C3
30 cm N30C2 N30C3 R30C2 R30C3 F30C3
1 m N1M2 N1M3 R1M2 R1M3 F1M3
3 m R3M2 R3M3 F3M3
5 m R5M2 R5M3 F5M3
Operating Temperature -196 to 150°C -100 to 150°C -196 to 150°C*1
Remarks Twisted for ≥ 50 cm L-11*2 L-12*2 L-3*2

*For other lead-wire cable lengths, contact us.

*1 -196°C: Because the gage leads are polyester-coated copper wires.

*2 The wire section of R-type and F-type are sandwiched or wrapped with the glass-cloth tape for insulation and reinforcement.
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How to order

When ordering, suffix the lead-wire cable code to the model number with a space in between.

E.g.
KFLB-5-120-C1-11 with a fluoroplastic-coated high/low-temperature 3-wire cable 5 m
long pre-attached
→ KFLB-5-120-C1-11 F5M3

If no lead-wire cable code is suffixed, the gage is delivered with gage leads only.
(Silver-covered copper wires 25 mm long)