Electronic Von Frey

Electronic Von Frey

The electronic model of Von Frey filament combines ease of use and rapidity for the determination of the mechanical sensitivity threshold in rodent.

  • New easier and more comfortable Handle
  • Provides objective and accurate data
  • The threshold value can be obtained in only one test, and in a highly reproducible manner
  • Elimination of the problems of filament standardization
  • Stimulation of areas of equal size
  • The end-point value is automatically recorded
  • Real time force curves in BIOCIS software

Item# Description U.S. List Price Quantity
76-0976 (BIOEVF4S) Electronic Von Frey EVF4S basic with hard and soft tips, footswitch, casing and software
76-0975 (BIOEVF4) Electronic Von Frey EVF4 package complete with hard and soft tips, footswitch and casing (without software)
76-0741 BIO-CIS Force ramp software
76-0788 (BIOPVF) Accessory: Robust animal enclosure for 2 rats or 6 mice for VF stand or heargreaves test
76-0789 (BIOSTDEVF) Accessory: Elevated stand with metal mesh, delivered without cage, fits up to 2 animal enclosures 76-0788
76-0636 (BIOEVF2PS10) Accessory: Patient switch for clinical research protocols (needed for clinical units)
76-0488 (BIOEVFD) Spare: Hard plastic tips, 10 units
76-0489 (BIOEVFRS) Spare: Elastic (spring) tips, 1 unit
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The electronic model of Von Frey filament combines ease of use and rapidity for the determination of the mechanical sensitivity threshold in rodent.

The Von Frey filament is applied against the central edge of the animal hind paw. Paw withdrawal caused by the stimulation is registered as a response. The corresponding force applied is recorded by the system and displayed on the large backlighted screen of the Von Frey unit with a resolution of 0.1 grams. A different tip is used for rat (hard plastic tip) and mice (elastic spring tip). A foot-switch is proved to carry out rapid hands-free experiments.

Differently to the procedure using classical Von-Frey filaments, the threshold value can be obtained in only one test, and in a highly reproducible manner. The electronic instrument does not present any temperature or hygrometry drift, which used to be an issue with the manual version of the filaments.

The new Electronic Von Frey EVF4 is provided with a easier and more comfortable handle. The BIO-CIS software can be used to automatically record the results on a PC through a RS 232 port (direct Excel exportation).

Specifications76-097676-0975
Measurement range 0 to 500 g (5N), 120% overload allowed without causing any damage to the sensor 0 to 500 g (5N), 120% overload allowed without causing any damage to the sensor
PrecisionResolution: 0.1 g; Accuracy: 0.2 gResolution: 0.1 g; Accuracy: 0.2 g
Temperature compensationfrom 0 to 50°Cfrom 0 to 50°C
Statistical functionsAverage value and standard deviation are computed for each subjectAverage value and standard deviation are computed for each subject
Internal Memoryup to 100 valuesup to 100 values
Power supply220-240 V (other voltages on request) 220-240 V (other voltages on request)
Weight6,5kg6,5kg