Donut/Through Hole Load Cell

LTH350 (L2761-Q10589) , 500 lb , Through Hole Donut/Washer Load Cell , 3/8" [9.53 mm] ID , 17-4 PH S.S. , Axial Cable Exit Out of The Top OD Surface , 29 Awg 4 Conductor Spiral Shielded Silicone Cable , 2 ft Long

Spec Sheet

3D Model Download

Listed price is in U.S. currency and subject to verification along with availability

Description

Application Use

The LTH350 Through Hole Donut/Washer Load Cell is a miniature, low-profile sensor designed for compression applications requiring the load structure to pass through the sensor such as bolt clamping force measurement.

Design

Its compact dimensions, light weight, and flexible inner diameter enable seamless integration into space-constrained setups without adding significant bulk to the assembly. The custom full bridge strain gauge and unique monolithic gauge design reduce output errors from extraneous/off-axis loads. Its low power consumption makes it ideal for battery-operated applications or setups where minimizing heat generation is crucial.

LTH350’s durable 17-4 PH stainless steel construction and operational temperature from -60°F to 200°F (-50°C to 93°C) make it ideal for demanding environments. Its low deflection of 0.002 in (0.05 mm) nominal satisfies applications that require a fast dynamic response. The load cell is RoHS compliant and includes a strain relief cable for enhanced protection and signal integrity.

Calibration and Customization

FUTEK’s ISO-certified calibration lab offers multiple options to ensure precision, reliability, and seamless integration with various instruments. For customized solutions or highly specialized applications such as extreme temperatures, radiation, vacuum/low outgassing, or high vibration/shock environments, please contact FUTEK. A customized version of the LTH family of sensors resides in Nasa’s Curiosity Mars rover. Manufactured by FUTEK in 2008, it continues to provide accurate drilling force measurements in extreme Martian conditions.

Features

Small Footprint: only 0.50” (12.7 mm) height and 1.48” (37.6 mm) outer diameter
Lightweight: 3.5 oz (99 g)
Flexible Internal Diameter: from 1/4” (6.58 mm) to 5/8” (16.10 mm)
Dynamic response: exceptional low deflection and high natural frequency
Energy efficient: 700 Ohm bridge resistance enables low power consumption
Wide Capacity range: from 100 (445 N) to 5000 lb (22240 N)
Robust cable strain relief: #24 AWG, 4 conductor, braided shielded
Teflon cable, 10 ft [3 m] long

Technical Documents

Resources

Bolt_Preload_Auditing

Donut Sensor Series Manual

How to reduce electrical noise in your system

LTH Connector Benefits

Specifications

Calibration

Electrical

Mechanical

Performance

Temperature

Zero

	CHANNEL	MIN	TYP	MAX	UNIT
Calibration Excitation	1		10		Vdc
Excitation	1	1		18	Vdc
Input Resistance	1		700		Ohms nom.
Insulation Resistance	1	500			Mohms @ 50 Vdc
Safe Overload	1			150	% of R.O.
Capacity	1			500	lbs
Hysteresis	1	-1		1	% of R.O.
Nonlinearity	1	-1		1	% of R.O.
Nonrepeatability	1	-1		1	% of R.O.
Output Resistance	1		700		Ohms nom.
Rated Output	1		2		mV/V nom.
Compensated Temperature	1	60		160	F
Operating Temperature	1	-60		200	F
Temperature Shift Span	1	-0.005		0.005	% of Load/F
Temperature Shift Zero	1	-0.005		0.005	% of R.O./F
Zero Balance	1	-1		1	% of R.O.

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