AquaMetrix ES-5 Operating Manual
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OPERATING INSTRUCTION MANUAL
Model ES-5
Toroidal 4-20 mA Output Probe
N116-127 REV. 3
Aquametrix, by Water Analytics Inc.
100 School Street
Andover, MA 01810
Tel: (978) 749-9949
Toll Free: (855) PH-PROBE
Fax: (978) 749-9961
www.AquaMetrix.com
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ES-5 Toroidal Sensor Manual
Table of C ontents
1!General Information
...................................................................................................................... 3!
2!Specifications
................................................................................................................................ 3!
3! Introduction to Conductivity ............................................................................................................ 3!
3.1!What is Conductivity?
..................................................................................................................................................... 3!
3.2!Principle of Toroidal Cell Operation
......................................................................................................................... 6!
3.3!Advantages of the Electrodeless Conductivity System
................................................................................... 6!
3.4!Temperature effects
......................................................................................................................................................... 6!
4! Installation ...................................................................................................................................... 6!
4.1! Electrode Connections ..................................................................................................................................................... 6!
4.2! Positioning of the Sensor ................................................................................................................................................. 7!
5! Operation ....................................................................................................................................... 7!
5.1!Calibration
............................................................................................................................................................................ 7!
5.2!Sample Requirements
.................................................................................................................................................... 7!
5.3!Measurement
...................................................................................................................................................................... 8!
5.4!Cleaning Methods
............................................................................................................................................................ 8!
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1 General Information
The ES-5 Conductivity Monitoring System consists of:
1. A loop powered micro-transmitter and an electrodeless conductivity sensor combined into a single
package. The probe consists of two measuring toroidal coils and a 4/20 current loop calibrated
transmitter.
2. RTD PT100 built into the sensor to provide Temperature Compensation.
Applications include water treatment, cooling tower and water monitoring.
2 Specifications
Measuring Method
Toroidal
Range ES-5-C-1
0-10 mS/cm
Range ES-5-C-2
0/100 mS/cm
Range ES-5-C-3
0/1000 mS/cm
Power Supply
11/30 VDC
Current Loop
4/20 mA isolated
Load
600 Ω max. @ 24 VDC
Installation
In-line or Immersion
Cell
Inductive
Temperatur e Co mpen sation
RTD PT100
Maximum Operating Temperature
50 oC for part in contact with the liquid
Temperature Coeff icient
2.2%/°C
Temperatur e Refer ence
25 °C
Maximum Pressure
10 bar at 25 °C
Length
207 mm
Thread
1.5" MNPT
Materials
CPVC (Kynar upon special request)
Cable Length
3 meters (other upon request)
3 Introduction to Conductivity
3.1 What is Conductivity?
Conductivity (or specifically electrolytic conductivity) is defined as the ability of a substance to conduct
electric current. It is the reciprocal of the more commonly encountered term, resistivity. All substances
possess conductivity to some degree, but the amount varies widely, ranging from extremely low
(insulators such as benzene, glass) to very high (silver, copper, and metals in general). Most industrial
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