Sensor Information; Vibration Switch (Lz12 Series) - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

SENSOR INFORMATION (vibration)
Vibration Switch (LZ12 Series): The Tuning Fork vibration switch operates at a nominal frequency of 400 Hz.
As the switch becomes immersed in a liquid or slurry, a corresponding frequency shift occurs. When the
measured frequency shift reaches the set point value, the switch changes state indicating the presence of a
liquid or slurry medium. For optimum performance and proactive maintenance, the sensor automatically
adjusts for coating, and if necessary, outputs a preventative maintenance alarm.
Do not squeeze the forks together. Doing so could damage or break the sensor and void the warranty.
When powering up the LZ12, the start up procedure requires the switch to cycle through a wet condition for
1/2 second in order to determine an initial resonance.
LZ12 Specifications:
Sensor material:
Process Temp.:
Configurations:
Part Number
LZ12 1405
LZ12 1425
4 of 20
Ryton® (glass fill)
Viton® cable grommet
F: 40° to 176°
C: 40° to 80°
Material
(body)
Ryton
Ryton
Maint. alarm:
Cable jacket mat'l:
Cable type:
Material
(cable)
Polypropylene
Polypropylene
LO900002
NPN transistor, 10 mA max.
PP
5 conductor, #24 AWG
(shielded)
Thread
(inside x outside)
¾" NPT x ¾" NPT
¾" R x ¾"G
E-1260
Step Three
Rev A