P501 Miniature Rotary Sensor

Position feedback for industrial and scientific applications


This sensor at a glance

Available in any measurement angle from 30° to 140°

Longer operating life than a potentiometer

Fast delivery options available

Body Diameter: 30mm

Sensor Mounting: Flange

Compact and lightweight

Sealed to IP67

Independent Linearity:
< ±0.25% up to 80°
< ±0.1 % option available

Resolution: Infinite

Temperature range: -40° to +125°C

The P501  is a miniature, affordable, durable, high-accuracy rotary sensor designed for industrial and scientific feedback applications, but requires a smaller footprint than the P500.

Like all Positek sensors, the P501 provides a linear output proportional with angle of deflection. Each unit is supplied with the output calibrated to the angle required by the customer, between 30 and 140 degrees. It is particularly suitable for OEMs seeking good sensor performance for arduous applications where space is important.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor has a rugged nickel plated aluminium body and integrated mounting flange. The flange has two 4.5mm by 20 degree wide slots on a 38mm pitch to simplify mounting and position adjustment. Sealing is to IP67 (boot version) and full EMC protection is built in.


Body Diameter
28.3mm (solder pins option)
30.8mm (cable boot option)
Body Length (to seal face)
8mm, OD 4mm
For full mechanical details see drawing
Measurement Range
Any angle from ±15° to ±70°
Independent Linearity
<±0.31% up to 80° at 20°C
<±0.1% available on request
Temperature Coefficient
<±0.01%/°C Gain & <±0.01%FS/°C Offset
Output Characteristics
See Graph

<0.02% FSO

Frequency Response

>10KHz (-3dB)

Output Signal and Output Load

0.5 to 4.5 V DC ratiometric
5K Ohms min
Power Supply
+5V DC nom

Temperature Limits

-40 to +125°C
-40 to +125°C


EMC Susceptibility
EN 61000-6-2
EMC Radiated
EN 61000-6-3
IEC 68-2-6: 10g
IEC 68-2-29: 40g
350,000 hrs 40°C Gf
IP67 (boot version)
Electrical Connections
Screened cable with boot or solder pins

Positek offers a range of options for its standard sensors. Each sensor is manufactured to suit each customer's preferences. If your requirement is outside the options given below, Positek can modify/ redesign a sensor to suit your specific requirement. Standard options are available as below:

Measurement Range

Factory set to any length from ±15° to ±70° in increments of 1°. For example, if your application requires 90° measurement, then Positek will manufacture the sensor specifically for this angular range. The sensor will measure 90° however will still rotate through 360°.

Electronic Options

Connector/Cable Options

Output Signal
Supply Input
Option Code

0.5V to 4.5V DC ratiometric
+5V DC nom. ±0.5V

Connector/Cable Options

Option Code
Lid with solder pins
Lid with boot IP67
Cable length - The standard length of cable supplied with a Positek position sensor is 50cm although you can specify any length you require.
Specified in cm after the L e.g. L200 for 200cm cable from axial cable gland (L0 for U option)

Shaft Options

Option Code
Plain shaft with flat
Tongue with spring clip

<+/-0.1% FSO Linearity error (80° max)
Option Code

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