ELF™ System

Economical Load and Force Measurement

Single element force sensors, advanced electronics and software produce a simple but powerful, cost-effective force measurement system.

Tekscan's ELF force and load measurement system matches the market's need for an inexpensive load and force measurement system with Tekscan's ability to deliver innovative load and force measurement solutions. The system consists of data acquisition hardware, software, and FlexiForce^® B201 sensors.

ELF Force and load Measurement Features & Benefits:

The system utilizes paper-thin (0.008”) FlexiForce B201 sensor technology.

The plastic ELF handle contains data acquisition electronics with USB connection and patented interface to B201 sensors.

Patented electronics allow you to optimize the performance of the ELF system over a selected force/load range. The electronics adjust the device sensitivity to best fit the dynamic range of the specific application. This allows you to "fine tune" FlexiForce sensors for optimal performance.

Simple calibration procedures can deliver accuracies of ± 5%. More controlled procedures can reach an accuracy level of ± 3%.

Standard ELF Single-Point Force Measurement System

This system enables you to measure force from one point at a time.

ELF System components The system components for the ELF System are as follows:

One (1) data recording software CD
- The software is compatible with Windows 2000, XP and Vista
One (1) USB-interface data acquisition handle
Three (3) B201 FlexiForce^® sensors (one in each force range of L, M, & H)

Multi-Handle ELF (MELF) System

The Multi-Handle (MELF) system enables you to measure force from up to sixteen (16) points at one time.

ELF Force Measurement Components The system components for the MELF System are as follows:

One (1) data recording software CD, enabling multi-point measurements
- The software is compatible with Windows 2000, XP and Vista
One (1) USB-interface data acquisition handle (up to fifteen additional handles can be purchased)
Three (3) B201 sensors (one in each force range of L, M, & H)

Additional Handles and Sensors are available to purchase separately from the ELF System.

*Laptop not included with Standard ELF or Multi-Handle ELF (MELF) systems.

ELF System components

ELF Data Acquisition Electronics

Residing within the plastic ELF handle is the data acquisition hardware with USB connection. This patented interface ensures optimal performance of our FlexiForce sensors. The simple insertion of a FlexiForce sensor yields a powerful measurement tool.

Our patented electronics allow you to optimize the performance of the ELF system over a selected force/load range. The electronics adjust the device sensitivity to best fit the dynamic range of the specific application. This allows you to "fine tune" our single element sensors for optimal performance. Designed to be user friendly, simple calibration procedures can deliver accuracies of + 5%. More controlled procedures can reach an accuracy level of + 3%. The ELF's innovative electronics provide high quality signals at distances of up to 30 feet from the PC.

Handle electronics schematic.

Handle electronics schematic

ELF System Manual

For more detailed information on the ELF System, including how to set it up and take force measurements, please download the ELF User Manual.

ELF™ System & Sensors - Specifications & Features

Physical Properties of the B201 Sensor

Thickness: 0.008" (0.203 mm)

Length: 9.0" (228.6 mm) End-to-end

Width: 0.55" (14 mm)

Active sensing area: 0.375" (9.53 mm) Diameter

Connector: Custom interface to ELF Data Acquisition System

Recommended Maximum Force

Sensor	Max. Force	Max. Force
Sensor	Max. Force	Max. Force
	(High Gain)	(Low Gain)
B201 - L	0 - 1 lb (4.4 N)	0 - 25 lb (111 N)
B201 - M	0 - 25 lb (111 N)	0 - 150 lb (667 N)
B201 - H	0 - 150 lb (667 N)	1 - 1000 lb (4448 N)

(Adjustable gain feature of the ELF System allows you to set force ranges)

Typical Performance

Linearity (Error): < ±3% (Line drawn from 0 to 50% load)

Repeatability: < ±2.5% of Full Scale (Conditioned Sensor, 80% of Full Force Applied)

Hysteresis: < 4.5 % of Full Scale (Conditioned Sensor, 80% of Full Force Applied)

Drift: <5% / logarithmic time (Constant Load of 90% sensor rating)

Response Time: < 5 µsec (Time required for the sensor to respond to an input force; Impact load - recorded on Oscilloscope)

Operating Temperature: 15°F - 140°F (-9°C - 60°C)*

* Force reading change per degree of temperature change = ±0.2% / °F (0.36%/°C)

* For loads less than 10 lb, the operating temperature can be increased to 165° F (74° C)

Standard ELF Software Features

Adjustable gain (lets you fine-tune the desired force range) Real-time graphic displays in strip chart, column graph, or digital readout Data retrieval and playback Ability to store and retrieve calibration files Internal triggering User-selected recording speeds from 10 Hz up to 200 Hz ASCII Output Compatible with Windows 2000, XP and Vista
	Single Handle ELF System Screen Shot

Optional Software Features

More advanced features are available upon request, such as: High Speed Data Acquisition: five different speeds from 8 Hz-5760 Hz Multi-Handle ELF (MELF) software: For the wired system, the multi-channel option allows measurement from up to 16 sensors at a time (each sensor requires an individual data acquisition handle). You may need to purchase a USB Hub to enable you to measure multiple points at one time.
		Multi-Handle ELF System Screen Shot

ELF System & Sensor Pricing

Standard ELF System
Single-Handle System	$599

Hi-Speed ELF System	$799

MELF System	$799

Hi-Speed MELF System	$950
Additional Handles: (1-4)	$400/each
(5-9)	$380/each
(10-15)	$360/each
Standard ELF Sensors
4-Pack	8-Pack
$65	$117

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ELF™ System

Economical Load and Force Measurement

ELF Force and load Measurement Features & Benefits: