Hand Applied Four-Point Probe
A four-point resistivity probe that can be hand-held and applied, incorporating a Jandel cylindrical probe head.



click either photo to see a larger image

Download the Hand Applied Probe (253K PDF file) brochure
Download the instruction manual (122K PDF file) for the Hand Applied Probe
The Hand Applied Probe can be combined with the HM20 Hand Held Meter
to make a complete portable four point probing system

PRINCIPAL FEATURES
  • Teflon body
  • 4-point cylindrical probe head can be easily changed
  • shorting switch to prevent sparking
  • easy placement by hand


    • APPLICATION
  • Measurement of bulk resistivity of large ingots unable to be mounted on a normal probe station.
  • Measurement of sheet resistivity of very large wafers or deposited films on large substrates.


    • GENERAL DESCRIPTION
    The unit comprises a Teflon body containing a cylindrical brass mass sufficient to cause the probe needles of the 4-point head (loaded up to 200g each) to be completely retracted. The Teflon body incorporates a lead about 1m long to connect to the associated electronic measuring equipment. There is a toggle switch marked ‘S’ (shorted) and ‘R’ (read) which permits the probe head to be raised off the sample, or placed on it, with no sparking. The current source is shorted at position ‘S’ on the hand applied probe independent of the FWD, SBY, REV switch on the power supply. Of course, when the probe head is in position the FWD/REV positions can be used in the usual way to observe forward and reverse readings.

    OPERATION
    The probe head should be installed so that its acrylic insulating pad (adjacent to the projecting probe needles) lies in the same plane as the lower Teflon surface. Rotate the probe head so that its needles lie at right angles to the longitudinal axis of the Teflon holder, and clamp firmly with the two red screws. To present the probe head to the specimen it is best to make contact with the rear end of the block (where the switch is) and rock the block downwards so that it effectively pivots about the rear. In this way the probe points will retract without scrubbing on the specimen surface. The actual position of the probe points can be seen via the cutaway.

    HIGH TEMPERATURE OPTION
    The Jandel Hand Applied Probe is available in a version that can withstand temperature of up to 200oC in an oven. The "read/standby" switch is removed and the Cylindrical Probe Head is modified to withstand 200oC.

    A complete four point probing system consists of the Hand Applied Probe shown above, combined with either the RM3 Test Unit or the HM20 Hand Held Meter

    SPECIFICATIONS

    Dimensions:

    Length:

    approximately 125 mm (4.9") front to rear
     

    Width:

    75 mm (3")
     

    Height:

    approximately 80 mm (3.15"). The wire from probe head projects an additional 30mm (1.18") upwards

     

    Weight:

    approximately 1.6kg (3.5 lbs)

    Downward force:

    approximately 1.1 Kg (2.4 lbs) - sufficient to easily retract 4 needles with 200g load

    Material:

    Virgin Teflon body with nickel plated brass weight to accept Jandel cylindrical probe Ø 25.4mm

    Electrical

    4-point probe with Teflon screened lead and Lemo 5-way plug and socket. Toggle shorting switch. Teflon screened lead to 180 degree x 5-way DIN plug.

    Information regarding our full range of four point probes can be seen here:

    http://www.four-point-probes.com/
    To the main Jandel Four Point Probe Page

    BRIDGE Technology is an authorized representative of JANDEL Engineering Ltd.

    To request further information please call Bridge Technology at (480) 219-9007 or send e-mail to Larry Bridge at: sales@bridgetec.com

    [Home] [Products] [E-mail]