Instruction Manual
7
Clean Sensing System
Ion Balance Sensors
Variable DC ionization is used to discharge over a wide area.
The Ionizer can be installed easily by inserting it between the Air Clean 
Unit and the top of the Clean Booth and securing it with screws.
Wiring work is greatly reduced by the connectors used for connection to 
the Air Clean Unit.
Discharge needles are modular 
and can be easily replaced.
LED indicators and external 
outputs provide notification when 
discharge needles require 
cleaning or discharge errors occur.
Cleaning outputs are made at two 
levels: warnings and alarms.
Discharging is stopped when a 
signal indicating that the Air Clean 
Unit fan has stopped is received.
This function prevents ozone from 
remaining due to discharging.
Two Sensors provide constant 
feedback on the ion balance to 
maintain uniform discharging.
Patent Pending
Discharge stop control
0
0 300−300
200
400
600
800
Discharge time: 2 s
Discharge time: 4 s
Discharge time: 6 s
Measurement Conditions
ZN-A2502 at maximum air volume
Discharge time from 1,000 V to100 V
Plate Monitor, 150 × 150 mm, 20 pF
Discharge time: 2 s
Discharge time: 4 s
Discharge time: 6 s
0
0 300−300
200
400
600
800
Measurement Conditions
ZN-A4105 at maximum air volume
Discharge time from 1,000 V to 100 V
Plate Monitor, 150 × 150 mm, 20 pF
Wide Discharge Area by Adopting Variable DC Ionization Method
Automatic Ion Balance Self-diagnosis and 
Display Functions
Ozone Buildup Prevention
Simple Maintenance
Simple Mounting and Wiring
ZN-J25A ZN-J41A
Distance from Ionizer (mm)
Distance from Ionizer (mm)










