Zero Speed Switch Sensor Model ZS09R For Conveyors and More
The Phares Electronics Zero Speed Switch Sensor Model ZS09R is a self-contained device that combines sensor and relay for use in over speed, under speed, and zero speed monitoring on augers, bucket elevators, conveyors, exhaust fans, turbines, windmills and many other applications where machine shaft speed monitoring is needed. It has an adjustable set point for precise, accurate and reliable speed measurement, and reacts quickly if your machine stops abruptly.
When machine shaft speed reaches the set point, the Phares ZS09R relay output changes state. It remains in this state until under speed or zero speed condition occurs.
The Phares ZS09R Zero Speed Switch Sensor senses both magnetic and high iron content targets such as a gear tooth, bolt head, key stock, etc. Outputs are isolated making it easy to incorporate into new or existing systems, or replace an inferior quality or obsolete sensor.
The Phares ZS09R Zero Speed Switch Sensor looks like a prox switch, but incorporates intelligent speed sensing circuitry not found in simple on/off devices. It is designed for switching logic inputs (PLC, VFD, DCS, etc.). For switching higher amperage circuits, please see our ZS09P Zero Speed Switch Sensor.
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Compact, self contained sensor. No additional control box needed. Switches 1/4 amp. Designed for switching logic inputs (PLC, VFD, DCS, etc.).
This little sensor is big enough to help prevent your expensive machinery from eating itself! You will not be disappointed with its performance.
Available locally at CED/Raybro Tampa, FL
Zero Speed Switch Sensor Model ZS09R Part Numbers
Relay Contact Rating
|ZS09R1-120||N.O./N.C. (Form 'C')||1/4 Amp||120 VAC|
|ZS09R2-120||N.O.||1/4 Amp||120 VAC|
|ZS09R3-120||N.C.||1/4 Amp||120 VAC|
|ZS09R1-D||N.O./N.C. (Form 'C')||1/4 Amp||6-24 VDC|
|ZS09R2-D||N.O.||1/4 Amp||6-24 VDC|
|ZS09R3-D||N.C.||1/4 Amp||6-24 VDC|
Part No. ZS09R-120: 120VAC, 20mA, 50/60Hz
Part No. ZS09R-D: 6-24VDC, 50mA
Relay Output: (specify when ordering)
SPDT Form ‘C’ dry relay contact (Normally Open/Closed)
SPST Normally Open
SPST Normally Closed
120VAC, 1/4 Amp pilot duty
G – max. 10-2000Hz
G – max. 11ms, 1/2 sine
Hall Effect and Inductive (Geartooth): 0.02Hz – 10kHz
Hall Effect Only: 0.02Hz – 25kHz
Sensing Distance (Gap):
1/16″ to 1/8″ using Geartooth Wheel, Bolt Head, Key Stock, etc.
1/8″ to 1/4″ using Magnetic Disk.
1/8″ to 5/8″ using Magnet or Magnetic Disk.
(Magnetic target sensing distance based on Phares Electronics Magnetic Disks and magnet types).
Minimum Geartooth Sizes:
1/8″ geartooth length, width, depth and gap.
High ferrous (iron) content.
-40°F to 140°F
4 ft., 6 conductor, 22 AWG, unshielded
(Custom cable lengths available.)
Figure 1. Dimensions of Model ZS09R Zero Speed Switch Sensor
Figure 2. Zero Speed Switch Sensor wiring connections.
There are LED indicators for Relay and Pulse. The Pulse LED illuminates whenever the ZS09P detects a target. The setpoint is adjusted via 10 turn trim pot.
Sensor Target Illustrations
Figure 3-5. Phares Zero Speed Switch Systems consisting of Zero Speed Switch Sensor and sensing target wheel.
The Phares ZS09R Zero Speed Switch Sensor requires a target suitable for sensing in order to measure speed. Sensor targets are sold separately.
Suitable targets are:
Bolt head or key stock