Nook Sensor System (NSS)

Patent Pending

The Nook Sensor System™ (NSS) is designed to meet the need for low cost position sensing on worm-gear screw jacks. It is highly accurate, with repeatability up to ± .004" (0.1mm). The patented design allows users to install and adjust sensors on a single screw jack and integrate easily with a motion control system. Since there is zero maintenance, the Nook Sensor System™ helps control screw jack systems in ways that have never before been possible.

The sensor system is supplied with two PNP or NPN (normally open) switches. For additional switches or to order a normally closed switch, contact Nook Application Engineers.

How To Order The Nook Sensor System™


Please (See Image 2 in Figure 1 Below)

The NSS is designed to allow easy field adjustments. Two magnets are secured to the end of the lift shaft to ensure a positive response once it passes near the position sensor. To adjust the position sensors simply position the lift shaft in the correct position, loosen the locking screw, and then slide the movable sensor to the desired location until the sensor indicates a response. The NSS is supplied with three slots in the stem cover, and two position sensors. Additional sensors can be added or moved to any of the three slots. It is also possible to add multiple sensors to the same slot.

Please (See Image 3 in Figure 1 Below) for Inch Jack Model and Metric Jack Model information and diagram.

Inch Jack Models A (in) B (in) Sensor Bandwidth (in)
05-BSJ and all MINI JACKS 2.83 1.88 .33
1-BSJ and 1-MSJ 2.83 1.88 .33
2-BSJ and 2-MSJ 2.83 2.25 .33
2.5-BSJ and 2.5-MSJ 2.83 2.25 .33
5-MSJ 3.19 3.38 .5
5-BSJ-I and 5HL-BSJ-I 3.19 3.38 .5
5-BSJ-U and 5-HL-BSJ-U 3.56 3.38 .5
10-MSJ 3.83 3.38 .5

Metric Jack Models A (mm) B (mm) Sensor Bandwidth (mm)
EM05-BSJ and EM05-MSJ 72 48 8
EM1-BSJ and EM1-MSJ 72 48 8
EM2.5-BSJ and EM2.5-MSJ 72 57 8
EM5-MSJ 81 86 13
EM5-BSJ-I 81 86 13
EM5-BSJ-U 90 86 13
EM10-MSJ 90 86 13
Figure 1