Tension Sensor FSP-422

4 Tension ranges available
from 0 - 100 cN up to 0 - 1000 cN

Stationary electronic tension sensors with non-rotating ceramic pins for threads and fibres

Max. line speed 6000 m/min

Tension sensor with RS-422 output for multi station system and connection to a with PC

Special Features

Tension sensor FSP-422 with integrated microprocessor controlled measuring amplifier and RS-422 interface for multi station system

Non-rotating, exchangeable ceramic pins for line speed up to max. 6000 m/min

Easy installation, even afterwards, on existing machines

2 Mounting possibilities: Housing mounting or cylindrical hole mounting (mounting cut out: longhole R 19 mm, length 54 mm)

Easy calibration to customized material by operator – zero and gain calibration is required

Measuring principle – loadcell with high quality strain gauge bridge

Tension sensor with mechanical overload protection

Standard Features

Control lamp shows operative mode availability

Tension sensor FSP-422 with aluminium housing

CAT 5 cables are used for data transfer

Required Power supply +15…24 V DC (regulated)

Certificate of Compliance with the order 2.1 according EN 10204 is included

Optionally available: Inspection Certificate 3.1 according EN 10204 with calibration report

Special features of the RS-422 interface:

  • Up to 32 sensors with different tension ranges and designs may be connected in one line (data transfer max. 200 readings/sec.)
  • Connection to RS-232 using a converter (RS-422 – RS-232).
  • The RS-422 signal can be used for a single sensor over a distance of 1000 m.
  • Each sensor can individually be addressed and set up
  • Can be connected to PLC controls with digital input
  • Simple connection to BUS-Systems using gateways

Lern more about the different tension measuring systems

You are not sure, which system is right for, or where the differences are? Here we explain it for you.

Available Models

ModelTension Range
Measuring Head Width*
SCHMIDT Calibration Material**
FSP-50-4220 – 50 cN64 mmPA: 0.12 mm Ø
FSP-100-4220 – 100 cN64 mmPA: 0.12 mm Ø
FSP-200-4220 – 200 cN64 mmPA: 0.12 mm Ø
FSP-500-4220 – 500 cN64 mmPA: 0.20 mm Ø
FSP-1000-4220 – 1000 cN64 mmPA: 0.30 mm Ø
Other tension ranges and measuring head widths available on request.
Other measuring units available, such as g.
* Outer dimensions of front plate
** Suitable for 95 % of applications PA = Polyamide Monofilament


Calibration to customized material:
If process material differs significantly from the SCHMIDT calibration material in diameter, rigidity or shape, special calibration using customer supplied samples is recommended. For this purpose a material sample of about 5 m should be supplied.

Anzeige SC-PM und Vorverstärker SCV-1For the tension sensor FSP-422 we offer different display units for one or more sensors, as well as strain gauge amplifier.

Find further information at display units and amplifier

tension sensor FS1Tension sensor FSP-422 can be reconverted for special applications.

Find further information at special design


Calibration:According to SCHMIDT factory procedure
Accuracy:±1 % full scale and ±1 digit or better
other calibration material:
±3 % full scale and ±1 digit or better
Overload protection:100 % of tension range
Measuring principle:Strain gauge bridge
Measuring roller deflection:Max. 0.5 mm
Natural frequency:Approx. 500 Hz, depending on tension range
Signal processing:Digital 12-bit A/D converter, Internal averaging up to 4 s
Communication frequency:200 readings/s
Temperature drift:Less than ±0.05 % full scale/°C
Output signal:RS-422 (57600, 8, N, 1)
Temperature range:10 – 45 ºC
Air humidity:85 % RH, max.
Power supply:+15…24 V DC, 50 mA (regulated)
Housing material:Aluminium
Dimensions:See dimensions
Weight net (gross):Approx. 320 g (approx. 420 g)

Specifications subject to change without notice!

Guide Rollers

Order-CodeLine Speed vmax. … m/minPin Material
Standard6000Aluminium-oxid ceramic Ø 5.2 mm

Accessories (optional)

  1. Software Tension Inspect 3

    Software Tension Inspect 3

    For displaying and saving readings on a PC (Win XP and higher; 32 Bit und 64 Bit).
    – Real-time reading
    – The readings are also shown in a X-Y- diagram (time/date-tension)
    – For data analysing the buffered diagram can be zoomed and scaled
    – Recording of the buffered readings as CSV-file (on user request)
    – Download of values to Excel

    Software for 4, 8, 12, 16, 24 or 32  sensors are available.

  2. Converter

    Serial Port Converter from RS-422 to RS-232 with terminal strip.
    Order number: EBG800

  3. Connecting Cable Cat 5 with open ends

    Cat 5 cable with open ends for RS-422/RS-232 converter and power supply to connect the last sensor. Length 3 m.
    Order number: EK0715

  4. Connecting Cable Cat 5

    Cat 5 cable for series connection of FS sensors, length 3 m.
    Order number: EK0711

  5. RS-232 Connecting Cable

    Connecting cable for connecting EBG-800 converter to PC, length 2 m.
    Order number: EK0643

  6. Mains Adapter

    Mains adapter K50204Recharger with 4 adapters (EU/USA/UK/AUS-NZL) for worldwide use,
    100 – 240 V AC
    Order number: K50204

Output Signal

Calibration Report

title page calibration certificate 3.1Inspection Certificate 3.1 according DIN EN 10204
including a calibration report is optional available.


Spare Rollers

Title guide roller catalogueDownload an overview for the guide rollers.



Dimensions of tension sensor FSP-422 for download.
Delivery Includes

Tension sensor FSP-422 with transport packaging, operating instruction in German or English (as requested), Certificate of Compliance with the order 2.1 according EN 10204 free of charge

Instruction Manual

Download the instruction manual of tension sensor FSP-422.

If you want to get a quote or want to place an order please contact us.

+49 (0)8638 9410-0

+49 (0)8638 4825