The Piab Dynamometer is an all-weather instrument, equally suitable for use in the laboratory or out in the field for weighing and measuring mechanical forces.

The pull rod movement operates the scale drum through a square thread stem.

The power absorbing element consists of specially made Belleville type spring washers, so designed as to be entirely free from wear.

The spring washers cannot be overloaded.

The Piab Dynamometer is fully pressure tight and each instrument is pressure tested. No leakage is permitted. The external surfaces are zinc plated with clear chromate passivation. If the dynamometer is to be used in a very corrosive atmosphere, it can be polyester lacquered.

The dynamometer can also be supplied nickel plated.

Safety factor 5:1 (Guaranteed to withstand a load of 5 times full scale reading before rupture.) The resistance to rupture is tested by the National Swedish Institute for Materials Testing. The dynamometer may be overloaded by 100% without impairing the accuracy.

The dynamometers, types M-G, have drop forged steel eye brackets (SIS 2174, st 52-3N acc. to DIN 17100, 50 D acc. to BS 4360); giving a guaranteed impact resistance to -4°F (-20°C).

The O-ring of the pull rod is protected by a neoprene rubber membrane.

On instantaneous unloading, e.g. breaking test, the return movement of the pull rod is retarded by a specially made spring washer. The Piab Dynamometer is approved by the National Board of Occupational Safety and Health for integral connection in the carrying system of a lifting device and for weighing of test loads in connection with inspection.

The Piab Dynamometer used for remote reading is supplied with a built-in precision potentiometer. The potentiometer is directly connected to the scale mechanism of the Piab instrument. The electrical resistance of the potentiometer varies in proportion to the load on the dynamometer. The resistance is indicated on a receiving instrument, calibrated individually and marked with the same serial number as the dynamometer. The connecting cable of the dynamometer is either 1 foot 7" long (0,5 m) and equipped with a Tuchel plug or 6 feet long (2 m) without the Tuchel plug.

If a dynamometer with potentiometer is delivered without receiving instrument, a resistance chart with at least 10 incremental values is included.

The Piab Dynamometer can be equipped with a built-on adjustable contact head. Using a microswitch, which is directly influenced by the pull rod, the dynamometer gives an electrical contact function at a previously set value. For the types MA-O the extension to the body length is about 3.15/16" (100 mm), for Q about 4.1/3" (110 mm), for S about 3.5/64" (78 mm), for U and G about 3.5/8" (95 mm) and for the type E about 4.1/64" (102 mm).

For a dynamometer with 1100 lb. or 2200 lb. capacity, the types MA and MB are used. These have spring assemblies for 1100 lb. or 2200 lb., arranged in type M housings.

The dynamometers MA-O can be equipped with 1-3 and the types Q-E with 1-5 microswitches. The electrical connections are made in the terminal box to a numbered connection block.