Airspeed Sensor
MEASURE PRESS FELT PERMEABILITY ON THE FLY
Permeability is key to understanding your felt’s condition. The Feltest AirSpeed Sensor helps you better plan your machine downtime, use the right amount of felt cleaning agents, and troubleshoot any performance problems.
It’s good practice to monitor the press felt condition on a daily basis. Permeability is key to understanding your felt’s condition, determining how water will flow through the felt mid-nip.
AirSpeed’s low-friction plastic measuring head contains a high precision vane that accurately measures the airspeed through the felt at both slotted and drilled uhle boxes.
If the airflow is low, poor sheet dryness or sheet crushing can be the consequences. High air flows indicate a very open felt, which can cause re-wetting or felt base marking.
The AirSpeed’s low-friction plastic measuring head contains a high precision vane that accurately measures the airspeed through the felt at both slotted and drilled uhle boxes.
The telescopic carbon fiber rod makes it possible to safely measure at longer distances.
All parts of the AirSpeed Sensor are robust and built to last in the rough, hot and humid environment at the paper machine.
It’s good practice to monitor the press felt condition on a daily basis. The Feltest AirSpeed Sensor helps you better plan your machine downtime, use the right amount of felt cleaning agents, and troubleshoot any performance problems.
Tip! Also read this related whitepaper:
| Correct felt permeability: how open do press felts need to be? |
“The combination of a Caliper Profiler and an AirSpeed is extremely powerful when assessing press felts”
| Specifications | AirSpeed Sensor |
|---|---|
| Required Control Unit | Feltest SpeedController |
| Range | 0.5 - 20 m/s | 1.6 - 65 fps |
| To be used on | Press felts only |
| Accuracy | ±5% of the max. scale |
| Read-out units | m/s, fps |
| Length range of the adjustable carbon rod | 610 - 1010 mm | 2 - 2.2 ft (telescopic) |
| Length of cable | Apporx. 2m | 6.5 ft |
| Proctection level | IP68 (when connected to the SpeedController) |
| Total weight | 0,4 kg | 0.9 lbs. |
CONTROLS BOTH AIRSPEED AND TRUESPEED SENSORS
The SpeedController reads and stores the measurement data of both the AirSpeed and TrueSpeed Sensor, a two in one control unit for both sensors!
MEASURE WHAT MATTERS: THE SURFACE SPEED
Detect slipping rolls and reduce machine clothing wear, and reduce input errors and hard-to-find runnability problems. The TrueSpeed Sensor makes measuring easy, quick and dependable!
DIFFERENTIATE FELT COMPACTION AND CONTAMINATION
The Feltest Caliper Profiler measures the caliper, or thickness of forming fabrics and press felts on the fly.
Caliper values help to estimate the remaining life of forming fabrics. For poorly dewatering press felts, the caliper helps to differentiate compaction, contamination and wear.
