설명

ALW Load washer

Key features

• Capacity from 5 lbf up to 20,000 lbf
• Stainless steel construction with IP64 rating
• Ultra-flat, compact design for integration into joints
• ±0.5% full-scale non-linearity
• Temperature compensated from -15 to +71 °C
• Multiple sizes and screw diameters available
• 5-point compression calibration included

About the ALW Load washer

The ALW Series Load Washers are strain gauge-based stainless steel force sensors designed for compression measurements. They offer a wide range of capacities, from 5 to 20,000 lbf, and are engineered for easy integration in bolt assemblies and structural joints. Non-linearity is better than ±0.5% FS, ensuring precision in critical fastening applications.

Usage conditions

Available in four model series (ALW1 to ALW4), these washers differ in outer/inner diameter and height to match various screw sizes. Each version comes with a shielded 4-conductor cable, either 0.086” or 0.126” in diameter, encased in a stainless steel strain relief spring for protection. Standard cable lengths are 3, 5, and 10 ft. Connectors (DB9 Male/Female) or raw wire options are available.

Applications

• Preload force monitoring in bolted assemblies
• Load control in structural connections
• Assembly verification in production lines
• Force distribution analysis in mechanical setups
• Integration into limited-space measurement systems

Advantages of choosing this product

The ALW Series offers versatility, durability, and precision in a compact form factor. Its stainless steel build, broad capacity range, and high accuracy make it suitable for demanding industrial, aerospace, and automotive applications. Custom pinouts and cable lengths are available on request.

Additional key features

• Safe overload: 150% of rated output
• Output range: 0.2 to 2.0 mV/V depending on capacity
• Low hysteresis and excellent repeatability
• Operating range: -15 to +80 °C
• 5-point compression calibration standard
• Deflection: 0.002” (0.05 mm) across all models

Technical Specifications

Specification	Value
Capacity (lbf)	5 – 20K
Rated Output (RO) (mV/V)	0.2 (5lbf), 0.4 (10lbf), 1 (25lbf), 2 (50-20000lbf) nominal
Safe Overload (%)	150 of RO
Zero Balance (%)	±2 of RO
Excitation (VDC or VAC)	7 max.
Bridge Resistance	700 Ω nom.
Non-Linearity (%)	±0.5 of RO
Hysteresis (%)	±0.5 of RO

 

WIRING

• Model LW1 is provided with a #32 AWG 4-conductor braided shielded cable with outer jacket, 0.086” [2.2 mm] diameter. Model LW2, LW3 & LW4 are provided with a #28 AWG 4-conductor braided shielded cable with outer jacket, 0.126” [3.2 mm] diameter. There is no connection between the shield and the sensor body. For additional protection, the cable is contained within a stainless steel spring for strain relief purposes.
• Standard wire configuration as shown below.
• Standard cable lengths are 3ft, 5ft and 10ft. See Order Details section.
• These load washers are offered with DB9 Male, DB9 Female and without connector. See Order Details section.
• For connector versions, pin configuration as shown below.

DIMENSIONS

DIMENSIONS CONTINUED

ORDER DETAILS

Model	Screw Size (inch)	Capacity (lbf)	Connector type	Cable length (ft)
ALWX	X/X	xxxxx	X	X
ALWl *	1/8	5	M – 0B9 Male	3
ALW2 *	3/16	10	F – 0B9 Female	5
ALW3 *	1/4	25	N – Without connector	10
ALW4 *	5/16	50
	3/8	100
	7/16	250
	1/2	500
	9/16	1000
	5/8	2000
	3/4	5000
	7/8	10000
	1	20000
	1¼
	1½
* Optional

Example:  ALW2·1/4·5000-N-5