Strain gauge

The Noliac strain gauge standard version for piezo ring actuators (single and stacked) is designed as a half bridge. The strain gauge is very small and can therefore be fitted to actuators with a free surface of 5x5 mm or bigger. 

Below you can find lists of our ring actuators and ring stacks and which option fits the individual size. 

More information?
If you want to know more about the strain gauge and which ring actuator or ring actuator stack to choose, please contact us using the Request for Quote form or contact sales.

Ring actuators 

* The strain gauge will be fitted to the ring actuator without wires or terminal board.

Ring actuator stacks

* On stacks with a height of 4 or 6 mm (order code H04 and H06), the strain gauge will be fitted to the ring actuator stack without wires or terminal board. On stacks with a height of 8 mm and above, the strain gauge will be fitted with wires and terminal board.

It is possible to equip the strain gauge with external wires. The standard length is 200 mm if no length is specified in the product code. The colour codes of the wires are these:

• U- (green)
• U+ (brown)
• Sign. + (yellow)
• Sign. - (white)

Where:

• U-: is the supply voltage of the strain gauge, which have a positive polarity in DC case or direct phase in AC supply case.
• U+: is the supply voltage of the strain gauge, which have a negative polarity in DC case or opposite phase in AC supply case.
• Sign. +: is the positive signal from the strain gauge.
• Sign. -: is the negative signal from the strain gauge.

Wire options
There are these different wire options depending on the actuator. Below the table of options, there are tables listing the different possibilities for each actuator type.

Example of product order codes with the wire options:

• NAC2013-S00: one of our plate actuators fitted with a strain gauge but without terminal and wires
• NAC2022-H18-S02: one of our plate stacks (height 18 mm) fitted with a strain gauge with both terminal board and 200 mm teflon wire
• NAC2123-S01: one of our ring actuators fitted with a strain gauge and 50 mm leads but without terminal
• NAC2125-H66-C: one of our ring stacks (height 66 mm) fitted with a strain gauge with a customized solution for terminal and wires

Plate actuators

Plate actuator stacks

* Available on plate actuator stacks of a height of 8 mm or more.

Ring actuators

Ring actuator stacks

* Available on ring actuator stacks of a height of 8 mm or more.

Wires between the bridge and terminals

It is recommended to attach wires with a bend to reduce pulling force from the sensor and to avoid a parasitic measurement due to wire deformation.