Tekscan Wireless ELF 2
(Wireless Economical Load and Force System)

The Wireless ELF 2 System is a user-friendly, cost-effective load measurement system. This system combines 3 FlexiForce® WB201 sensors, battery-operated WiFi transmitter (certified 802.11b radio- 802.11b/g/n compatible), and Windows-compatible software*, turning your PC or laptop into a force measurement instrument. The WELF2 system, sampling rates up to 200 Hz and comes in a high speed version with sampling rates up to 6,000 Hz. The WiFi connection setup has ad hoc and access point (unsecured router) network capability. For multi-handle use an unsecured router is required.

*The ELF Software is compatible with Windows 7, 10 and 11.

Wireless Force Measurement Features & Benefits:

• Real-time data capture
• Movie recording & saving
• ASCII output to data analysis software
• Multi-point calibration
• Simple and storable calibration
• Capability to tare a load
• Adjustable sensitivity
• Internal triggering
• Displays in strip chart, column graph, or digital readout
• Includes 3 AAA batteries. Battery life up to 5 hours
• Connector compatible with all FlexiForce 2/3 pin sensor models: WB201, A201, A301, and A401

WELF 2 System

System Performance

WELF2 System	Sampling Rate	Range	Max. # of Handles	Includes
Single Handle	Up to 200 Hz	65 Meters	1	(1) Handle-WiFi transmitter, (3) WB201 sensors, Windows-compatible ELF software
Single Handle High Speed	Up to 6,000 Hz	65 Meters	1	(1) Handle-WiFi transmitter, (3) WB201 sensors, Windows-compatible ELF high speed software
*Multi Handle	Up to 200 Hz	50 Meters	16	(1) Handle-WiFi transmitter, (3) WB201 sensors, Windows-compatible ELF software
*Multi Handle High Speed	Up to 6,000 Hz	25 Meters	8	(1) Handle-WiFi transmitter, (3) WB201 sensors, Windows-compatible ELF high speed software

*An unsecured router is required for multi-handle use. Additional handles (WiFi transmitters) available for purchase.

Physical Properties of the Wireless Transmitter (Handle)

Length: 3.75" (95.3 mm)
Width: 1.83" (46.4 mm)
Height: 1.05" (26.7 mm)
Weight: 3.3 oz (95 g)

WELF 2 Sensors (Model WB201)

The Wireless ELF 2 system comes complete with three WB201 FlexiForce sensors (one in each of the three available force ranges):
WB201-L: Low (0-25 lb; 111 N)
WB201-M: Medium (0-150 lb; 667 N)
WB201-H: High (0-1000 lb; 4450 N)

The sensors are terminated with a male square pin to easily connect to the Wireless Transmitter.

Physical Properties

Thickness: 0.008" (0.203 mm)
Length: 7.75" (197 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 (High Gain)	Max. Force (Low Gain)
WB201 - L	0-1 lb (4.4 N)	0-25 lb (111 N)
WB201 - M	0-25 lb (111 N)	0-150 lb (667 N)
WB201 - H	0-150 lb (667 N)	1-1000 lb (4448 N)

Adjustable gain feature of the Wireless ELF 2 System allows you to set force ranges.

Typical Sensor 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)

WELF 2 Software

Standard 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
• Simple and storable calibration files
• Internal triggering
• User-selected recording speeds from 10 Hz up to 200 Hz
• ASCII Output to data analysis software
• Compatible with Windows 7, 8, XP, and Vista
• Capability to tare a load

Optional Software Features

• High Speed Software
• Multi Handle Software
• Multi Handle High Speed Software

Please note: (1) sensor requires (1) transmitter to measure (1) point. If you need to measure additional points, you need to purchase additional transmitters and sensors. An unsecured router is also required for multi-handle use.