Goniometer
GPM Model 117 Price: $1,539
Product Details
The screw-on goniometer is highly suitable for measuring angles especially on the face and facial bone structure. It can be attached to the beam compass (anthropometer No. 101), to the slide compass (No. 104) or to the calipers (No. 106-109).
The screw-on goniometer consists of a nickel-plated protractor with a rotating indicator fitted at the crown such that the indicator is always facing upwards. The rear of the frame has a sheath with two fixing screws, used for fixing the goniometer to the respective measuring instrument.
When using a screw-on goniometer with one of the above-mentioned instruments, take special care that the measurement points lie in the same vertical plane.
When using the beam compass (on one of the steel rulers) ensure that the two transverse bars are both extended to the same degree.
Application: When measuring, for example, face angles, - the instrument is placed on one of the two sides of the upper cross bar of the sliding circle and fastened with the screw. Then you put the sliding caliper, crossways on the other side of the measuring points and can read directly on the arc of the angle that forms the line passing through the measuring points to the plane in which the skull or head is aligned. (e.g., to the ear-eye level). When the instrument is reversed the reading will be at the edge at the back of the pointer if one uses the attachable goniometer in conjunction with the bar compass; so both steel rulers must be extended equally. The goniometer can also be attached to the caliper since the measuring rod always runs parallel to a connecting line through the two probe tips. This combination allows, for example, the measurement of the angles that form different levels of orientation with each other.
Caution: For cleaning please do not use acetone or acetone-containing cleaning agents.
GPM anthropological instruments are high-precision instruments, manufactured for decades to the highest levels of Swiss quality craftsmanship. These instruments are exported worldwide and are based on the anthropology developed by Rudolf Martin. Ongoing work on new technology and development ensures an assortment of GPM instruments that are always up-to-date and meet every demand.