Inductive Velocity Sensor0 pages

Inductive Velocity Sensor I MSZ214 | MSZ218
Description

A

Velocity sensors MSZ214 and MSZ218 are electro-magnetic transducers with self excitation.
MSZ214 has a diameter of 14 mm (M14 thread) and MSZ218 a diameter
of 18 mm (M18 thread).

Features
•tContactless sensing of mechanical motion such as the rotational
speed of drives or shafts.
•tPulses are generated by the movement of ferrous gear teeth, for
t example, as they pass the sensor head.
•tThe electronic control circuitry and sensor head are designed as an
integral unit.
•tThe electronic control circuitry is reverse polarity protected.
•tA digital output is available corresponding to the frequency of
t movement past the sensor.
•tConnection by 2 m permanent cable

Mode of operation

Technical data

A ferro magnet actuator such as a gear, screw-head or slot in a shaft,
passes near to the sensor face, causing the magnetic field to change
such that voltage is induced in the coil of the sensor. This voltage is
converted into a digital output signal by means of a comparator and
made available to the user via a transistor output. The output frequency
is directly proportional to the actuator speed.
As this principle is based on voltage induction, the actuator needs to
have a certain minimum circumferential speed in order to induce a
voltage high enough to be evaluated. A rotational motion from “zero”
speed cannot therefore be detected (see diagram “Operating range”
on next page). The benefit of this principle is the high upper frequency
limit of 20 kHz.

Type No.
MSZt
Inductive Velocity Sensor
t
214t
diameter/thread M14x1
t
218t
diameter/thread M18x1
tt
Version
tt
Mt stainless steel 1.4305/AISI 303
ttt
Output signal
ttt
1t
open collector 40 V/40 mA
tttt
Connection
tttt
At 2 m cable, with open end
214 -t

Mt 1t

At

ordering example

Digital frequency output

metric
M 14x1
M 18x1

Housing tt

stainless steel 1.4305/AISI 303

Max. tightening torquet
ttt

50 Nm with MSZ214
100 Nm with MSZ218

Max. pull out force
(connection cable) t

50 N

Max. pressure (sensor face)t

10 bar/145 psi

Degree of protectiont
(IEC 529/DIN 40050)t

IP67
±0.76 mm (55 Hz),
to IEC 60068-2-6;
10 frequency cycles/axis

Shock tt
ttt

30 g (11 ms)
to IEC 60068-2-27

Connectiont

2 m three-wire cable

fout = Z x n/60 (Hz)

Z = number of teeth on the pick-up
n = rotational speed of the pick-up in 1/min (rpm)

7
8
9
10

Temperature ranges:
with cable permanently connectedt
sensor face areat

-30 ... +85 °C/-22 … +185 °F
-30 ... +125 °C/-22 … +257 °F

Voltage supply:
Ub tt
t

DC 5 V...36 V

Notes:
The max. admissible residual ripple is 10 %, but not less than the
minimum voltage or more than the maximum voltage.
The supply voltage has no influence on the minimum required actuator
speed and the useful frequency range of the sensor.
Supply current (without load):
Io (Ub = 5 V)tt
Io (Ub = 36 V)tt

Output

Output frequencyt

Mechanical data:
Outer thread tt
MSZ214tt
MSZ218tt

Vibration tt
ttt
ttt

Ordering information

MSZt

MSZ

5 mA
8 mA

Electrical tests:
ESD -t test to VDE 0834-2, class 3
EMC -t test to IEC 60065(sec)96,
tt class 3 a (Ub ≥ 15 V); class 3 b (Ub < 15 V)

Open collector - NPN
t
t

1
2
3
4
5
6

11
12
13
14
15
16
17
18
19

Umaxt=t 40 V
Imaxt =t 40 mA

B

With integral overload protection.

www.flowvision-gmbh.de

EDITION B

203