Jandel Engineering Limited supplies an optional press-fit light shield for times when it is necessary to shield samples from light, perhaps because they are photo-sensitive. It is offered as shown in the picture above. It is a two piece design, allowing the shield to be used on samples between 0.0 and 4.0mm thick and 50mm diameter.
Jandel Engineering Limited offers the PN Typing unit to determine the conductivity type of higher resistivity samples. The PN Unit is an optional extra for the various Jandel four point probe measurement systems. The same plug which is used for the Jandel Test Unit can be plugged into the PN unit. The sample is tested using the rectification method.