UDW3

The UDW3 is a waterproof, six-component sensor designed for accurate underwater force measurements. Manufactured from heat-treated stainless steel, this 3 inch diameter sensor features an end connector and mounting surfaces equipped with threaded holes for easy attachment. The UDW3 is available in multiple load capacities between 100 lb and 1,000 lb (see Specifications Tables).

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This transducer is oil-filled and features a pressure compensation bladder that equalizes the internal and external pressures on the device. The bladder expands and contracts with the increase and decrease in pressure, keeping zero pressure difference across the strain element. This allows for accurate force and moment measurements even when the sensor is submerged to depth. The UDW3 is rated for submersion in fresh water to depths of 70m for 1 continuous week. For greater depths, longer durations, or different environments, please contact AMTI.

See the Specifications Tables below for more details.

Complete your system with our state-of-the-art Gen-5 amplifier

AMTI's Gen-5 signal conditioner (amplifier) features advanced functionality and built-in digitization to provide you with a powerful and flexible system. Connect to your PC and start collecting data straight out of the box.

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System Information

AMTI's industrial sensors can be paired with optional components to create a complete system.

GEN-5 Amplifier

Advanced signal conditioner
Pairs with multi-axis sensors or legacy plates
USB 2.0 digital or analog outputs

Transducer Cable

19-pin Glenair waterproof connector
Connects force sensor to amplifier
Data transfer and power supply

NetForce

Basic data acquisition software
Compatible with AMTI force plates & sensors
Export to .bsf or text file for post-processing

Specifications & Details

Review detailed force transducer specifications and model versions below.

General Specifications

Temperature Range -18°C to 50°C
Channels Fx, Fy, Fz, Mx, My, Mz
Body Material Stainless Steel
Excitation 10V Maximum
Fx, Fy, Fz Hysteresis <1% full scale output
IP Rating IP68 (70 m)
Analog outputs 6 channels
Digital outputs USB, with GEN-5
Sensing Elements Strain gage bridge
Amplifier GEN-5 available for purchase
Crosstalk* < 2% on all channels
Fx, Fy, Fz non-linearity ±0.2% full scale ouptut
Available Capacities (Fz, lb) 100, 250, 500, 1000

Temperature Range 0°F to 125°F
Channels Fx, Fy, Fz, Mx, My, Mz
Body Material Stainless Steel
Excitation 10V Maximum
Fx, Fy, Fz Hysteresis <1% full scale output
IP Rating IP68 (70 m)
Analog outputs 6 channels
Digital outputs USB, with GEN-5
Sensing Elements Strain gage bridge
Amplifier GEN-5 available for purchase
Crosstalk* < 2% on all channels
Fx, Fy, Fz non-linearity ±0.2% full scale ouptut
Available Capacities (Fz, lb) 100, 250, 500, 1000

Capacities, Sensitivities & Frequencies

The table below provides a comparison of the available capacity models for this force sensor

Model Name Suffix (Fz, lbs)	100	250	500	1000
Fx, Fy Capacity (N)	225	555	1115	2225
Fz Capacity (N)	445	1115	2225	4450
Mx, My Capacity (Nm)	11	28	56	110
Mz Capacity (Nm)	5.6	14	28	56
Fx, Fy Sensitivity (µV/V-N)	5.40	2.70	1.35	0.67
Fz Sensitivity (µV/V-N)	1.35	0.67	0.34	0.17
Mx, My Sensitivity (µV/V-Nm)	266	137	71	35
Mz Sensitivity (µV/V-Nm)	212	106	53	27
Lowest Natural Frequency* (Hz)	300	500	700	1000

Model Name Suffix (Fz, lbs)	100	250	500	1000
Fx, Fy Capacity (lb)	50	125	250	500
Fz Capacity (lb)	100	250	500	1000
Mx, My Capacity (in-lb)	100	250	500	1000
Mz Capacity (in-lb)	50	125	250	500
Fx, Fy Sensitivity (µV/V-lb)	24	12	6	3
Fz Sensitivity (µV/V-lb)	6	3	1.5	0.75
Mx, My Sensitivity (µV/V-in-lb)	30	15.5	8	4
Mz Sensitivity (µV/V-in-lb)	24	12	6	3
Lowest Natural Frequency* (Hz)	300	500	700	1000

*The listed natural frequency is the lowest natural frequency for the force sensor and will dominate.

Technical Drawings

UDW3 Outline Drawing

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