The Hand Applied Probe combined with the ResTest Meter is a high quality four point probe measurement system which incorporates the Jandel Cylindrical probe head. The system can be used to measure a wide range of materials with varying shapes and sizes.
About the Jandel ResTest Four Point Probe
- Constant current source and meter for use in making the four point probe measurement.
- Measurement range: 10 milliohms-ohms-per-square to 10^6 ohms-per-square
- Displays either sheet resistance or volume resistivity.
- Save data using:
- PC connection
- Up to 99 measurements can be stored internally, or
- USB memory stick
- Accommodates either linear or square array probes and 6 choices of probe tip spacings
- Supports four measurements types:
- Sheet Resistance – Primary measurement value is display in Ohms/Square
- Wafer Resistivity – Primary measurement value is display in Ohms/Cm
- Volume Resistivity – Primary measurement value is display in Ohms/Cm
- Ohms Resistance – Primary measurement value is display in Ohm
- Three available current ranges:
- 0.5mA to 10mA
- 10uA to 100uA
- 1uA to 10uA
- Includes PC interface software
- Interfaces with Jandel four point probing units
About the Jandel Hand Applied Probe
The Hand Applied Probe is ideally suited for use in measuring large substrates and flat panels, however, it can be used to measure wafers and even small samples as well. When measuring small samples, you will sometimes need another piece or two of the same thickness of material underneath the back side of the probe body so that the entire unit rests on the material in the same plane, i.e., to keep it level. A discussion of using the Hand Applied Probe on small samples can be seen on page four of the following PDF file: https://four-point-probes.com/jandel-hap.pdf
Hand Applied Probe 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.
Hand Applied Probe 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.
The Hand Applied Probe incorporates the Jandel Cylindrical probe head which is built to high standards of quality and accuracy. A brochure regarding the Cylindrical probe can be found here: https://four-point-probes.com/jandelcylindrical.pdf
Information regarding the constructions and specifications of the Jandel Cylindrical probe can be seen here: https://four-point-probes.com/cylindrical_app_notes.pdf
ResTest Four Point Probe Measurement Unit
The ResTest is a combined constant current source and digital voltmeter, which has been designed specifically for use with a four point probe to produce resistivity and sheet resistance measurements. The unit supplies a constant current and can display resultant voltage sheet resistance and volume resistivity.
The ResTest has a large color display and it can read-out in either sheet resistance in the range from 10 milliohms-per-square up to 106 (1 million) ohms-per-square. The range is not as great as the RM3000, however, it is faster and has a larger color display.
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We Recommend
If you do not require as great a measurement range as the ResTest Test Unit provides, you might be interested in the: Hand Applied Probe combined with HM21 Hand Held Meter.
Hand Applied Probe with RM3000 Test Unit features high accuracy, an excellent range, and many features which simplify the four point probing measurement: Hand Applied Probe with RM3000 Test Unit
Four-Point-Probes is a division of Bridge Technology. To request further information please call Bridge Technology at (480) 219-9007 or send e-mail to Joshua Bridge at: sales@bridgetec.com
