Automatic Concentration Measurement
Automatic
Concentration
Measurement
®
®
ZESTRON
EYE Application
Area
Anwendungsbereich
des ZESTRON
EYE
The ZESTRON® EYE is a digital monitoring system that enables the precise measurement and control of
cleaning bath concentration for electronics cleaning processes in real time and irrespective of flux loading. It is
easily integrated within commonly used cleaning machine types and manufacturers.
Cleaning bath concentration fluctuates over time for a variety of reasons including drag-out and evaporation.
Unchecked, this will result in dilution of the cleaning agent and compromise cleaning results. Thus, continuous
concentration monitoring is essential to ensure the stability and reliability of the cleaning process, thereby
guaranteeing the high quality cleaning results expected.
Manual measurement methods, such as the ZESTRON® Bath Analyzer, are inexpensive alternatives. However,
the ZESTRON® EYE offers automated process control including data management and storage for quality
assurance.
ZESTRON® EYE is specifically designed for ZESTRON cleaning agents and
provides:
 Precise and automatic concentration measurement for fresh and loaded cleaning baths
 Real time cleaner concentration management to quickly react to changes of the cleaner concentration in the
running process
 Continuous data storage for traceability of monitored process parameters
 Touch screen interface for ease of use
 Ability to integrate with the cleaning equipment PLC and automated dosing system
 Reduced operator workload due to automated measurements
Advantages compared
to conventional measuring methods
Conventional ultrasonic or optical liquid concentration measurement systems typically rely on a single variable
to determine concentration. However, the ZESTRON® EYE incorporates 3P-Technology that simultaneously
assesses three distinct parameters to characterize the liquid flow and resulting concentration. The sender and
receiver are external to the sensor eliminating the possibility of erratic readings due to changes in the liquid
flow rate or surface contamination.
Due to the specific positioning of the signal converter on the outside of the ZESTRON® EYE sensor, the system
is able to analyze the cleaning agent flowing through without being affected by any signal disturbing parts,
such as forked sensors in the pipes, which are common in conventional ultrasonic measuring systems.
Concentration Measurement Method Comparison:
Measurement
accuracy
Signal stability
(contamination
load )
Process
disturbance
Conventional
Ultrasonic Measurement
++
+
++
Very stable against contamination
(i.e. flux load)
++
+
Concentration measurement affected
by flux loading and sensor surface
contamination
-
Conventional Optical
Measurement, i.e. nD
-
Not suitable for running/operating
cleaning processes
-
Very sensitive to contamination
-
None, as sensor does not contain any flow
disturbing parts
Sensor positioned in the middle of the
cleaning agent flow
pressure drops and turbulence
System installation influences the laminar
flow and thus leads to pressure drops
++
-
+
Required space
Integration/
Installation
ZESTRON® EYE
3P-Technology
++
-
-
No adapter necessary, standard external
thread, can be connected via Ethernet or
analog output with PLC and dosing system
Adapter required for integration into the
cleaning agent cycle of the machine
Adapter required for integration into the
cleaning agent cycle of the machine
++
-
+
Investment cost
++ excellent/ low
+ good/ medium
- poor/ high
The sensor is manufactured of stainless steel and is void of moving parts, thereby ensuring long and
maintenance-free product life.
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Powered by 3P-Technology
ZESTRON® EYE is state of the art technology featuring automated, digital real-time concentration measurement
for electronics cleaning processes. It is based on 3P-Technology, an innovative acoustic measuring method.
This technology enables liquid concentration determination with extraordinary accuracy without impeding
liquid flow. The sensor design is compact for ease of installation in commonly used cleaning machines.
Unlike conventional acoustic methods that rely on measuring a single parameter, such as signal frequency,
the 3P-Technology simultaneously monitors three parameters in order to characterize and analyze the cleaning
agent concentration. The 3P-Technology parameters are:
1. Signal time period (t): Time interval between signal waves
2. Signal amplitude (A): Strength of the signal waves
3. Signal dampening (D): reduction of the signal amplitude (A) over time
ZESTRON® EYE - sensor
Measures flowing cleaning agent and transmits
monitored data to the ZESTRON® EYE controller
Sender
t1
Receiver
t2
t3
t4
ZESTRON® EYE - controller
The incoming signal is analyzed based on
the cleaning agent characterization data
15.01 %
D
A
Operating principle:
1. The ZESTRON® EYE sensor, integrated within the wash pipe system of the cleaning equipment, continuously
analyses the cleaning agent as it is pumped through the cleaning cycle.
2. The 3P-Technology simultaneously records three parameters: Signal time periode (t), Signal amplitude (A), and
Signal dampening (D). This multiparameter characterization ensures accurate and reliable measurement.
3. Zestron cleaning agents are characterized by their unique acoustic fingerprint. Using this data, the ZESTRON®
EYE controller is calibrated for accurate concentration measurement.
Integration Options
The ZESTRON® EYE can be integrated into the cleaning equipment in several ways and provide either manual
or automatic process control.
ZESTRON® EYE - Manual Control
The sensor is installed directly into the high pressure side of the wash pipe line or via a bypass. The concentration measurement is visible on the ZESTRON® EYE controller.
Cleaning
Agent
C
Cleaningchamber
DIWater
S
Characteristics:
• The system continuously measures
the concentration and the temperature of the cleaning agent and
displays the data on the controller
touch screen.
• The desired cleaning agent
concentration
is
maintained
by manually adding cleaning
agent concentrate and DI-water
as required.
ZESTRON® EYE - Automatic Control
The sensor is installed directly into the high pressure side of the wash pipeline. The controller output signal
is connected with the cleaning equipment PLC for the automated control and dosage of the concentrate and
DI-water as required.
In this case, the necessary PLC program upgrade is provided by the specific cleaning equipment manufacturer.
C
Cleaningchamber
DI-Water
Concentrate
S
Characteristics:
• Full integration of the system into
your cleaning machine
• System continuously measures
the concentration and temperature of the cleaning agent
• Automatic dosing of cleaning
agent concentrate or DI-water
possible (Requirement: your
cleaning machine includes a
dosing system)
Technical Information
ZESTRON® EYE sensor
The ZESTRON® EYE sensor is available in three sizes and can be easily integrated into your cleaning machine.
The sensor is made of stainless steel and polished on the inside. The extremely smooth surface prevents the
deposit of residue particles inside the sensor and thus guarantees a long and maintenance-free product life.
Measuring Technology ZESTRON® EYE
3P-Technology
Measuring Resolution
+
- 0.01
Measuring Frequency
%
sec. / min. / h. Customer selected (minimum interval =1 second)
Concentration Window
Material
Process Connections
Application Temperature
%
Stainless Steel
Optional
°C / °F
Diameter
Optional
Length (l)
Height (h)
Cleaning agent dependent
1.4404 / AISI 316L (V4A)
External thread
0 - 100 / 32 - 212
DN 8
DN 15
DN 25
mm
130
152
210
mm
55.5
61
75
40.
61.
G 1/2“
15.
124.
152.
Version: DN 15
ZESTRON® EYE controller
The ZESTRON® EYE controller is touch screen operated. The intuitive menu control allows the operator to
individually program the measuring frequency and the way the concentration graph is presented. The controller
can further be connected to the PLC of your cleaning machine to control a dosing system.
Digital Interface
Analog Interface
Power Supply
Operating Temperature
Range
Ethernet/ Modbus
mA / V
V DC
4 - 20 mA / 0 - 10 V (switching contact: relay max. 50 V / 2 A)
24
°C / °F
0 - 70 / 32 - 158
Cable Length
Optional
1m, 2m, 5m, 10m
Data Capacity
GB
2 (2 million measurements possible measurements up to 2 years)
52.
104.
30.
34.
110.
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