Wind Blown Erosion Measurement Solutions

Flat Plate Surface Particle Movement Sensor Model FP5


The model FP5 is an extremely sensitive flat plate surface movement detector providing data the instant movement occurs. When this data is processed with wind speed data, a very accurate value for the threshold of movement (wind speed or stress, U*) can be determined.

Sensit is currently reorganizing it's manufacturing facility and will begin production very soon.

We are also designing some new erosion sensor products. Please stay tuned for updates.

And please send us an email if you anticipate ordering in the near future. This will help us

determine  immediate manufacturing requirements to help you receive your Sensit(tm)

erosion sensors as soon as possible. Thank you for your never-ending support and patience.

Sensit has been faithful to it's customers for over 30 years and will continue supplying you with

the superior products you are accustom to receiving from Sensit.


NEW! Model FP5 Flat Plate Movement Sensor. The sensor's active surface is 2.54cm in diameter and extremely sensitive. Like the H11-LIN, produces a TTL/CMOS compatible pulse for each particle impact. The low power requirement is 0.1032 watts (12V@8.6ma) and like the H11-LIN is well suited for remote use in all environmental conditions including the extreme environment of Antarctica. It comes with 6 meters of stainless steel wrapped conduit shielded cable. There are three wires; +12V (red), ground (black) and a particle count output wire (green). It comes with 600u and 1,000u glass spheres for testing. A 9V battery and a prewired connector for the battery are supplied so its response can be tested on your desk when it arrives. A detachable wind diffuser is also supplied to help prevent scouring around the sensor in sand. It has a 1/4"-20TPI hole in the bottom for mounting. This will fit most camera tripods. A variety of stainless steel hardware is also supplied for attachment including a 1/4" x 9" shaft that screws into the base to penetrate the ground keeping the sensor upright and misc. bolts, threaded stock etc.

Flat Plate Surface Movement Detector


FP5 sensor

6 meters, stainless steel flex-conduit shielded 3 wire 20AWG wire cable.

Mounting accessories package.

Stainless steel dia:1/4" len:9" threaded mounting post for stability in the ground.

Glass spheres for testing; 600u and 1000u diameters.

4GB USB memory stick contains Sensit technical documents. 3.8GB extra memory for data downloading in the field.

9VDC battery for testing sensor in the office.

Stainless steel bulkhead strain relief connector for cable feed through into data logger package.

Technical manual - TM-FP5-RevC
FP5-RevC Technical Manual.pdf

Technical manual for Model FP5-RevC Flat Plate surface movement detector including wiring information.



RED +12VDC @ 8.6ma

BLK Ground

GRN Particle counts output (PC) TTL/CMOS compatible pulse, 1.0mS pulse width.


Power Consumption: 0.1032 watts


The sensor comes as a complete package including the FP5-RevC sensor, wind diffuser, 6 meters of stainless steel flex shielded cable, a variety of mounting hardware, battery, 4GB USB memory stick with technical files for both erosion sensors, glass spheres of 600 and 1,000 micron diameters, stainless steel bulkhead feed through connector and a 9V battery to supply power for immediate check out without the need for a power supply.


The sensor also has a port in the side of the base where a blue LED can be seen flashing once for every particle impact. This allows you drop the glass spheres on the sensor's surface from various heights and observe its remarkable sensitivity.