The Liquidew EExd offers complete trace moisture measurement, applying a robust sensor technology to provide direct, accurate, on-line measurements for moisture dissolved in process liquids. Purpose designed explosion proof analyzer provides single or dual-channel measurements, convenient display interface and easy installation for new projects and retrofi ts to existing plants.

Technical Specification

Main Unit Measurement Parameters
Channel Configuration	Single and dual channel
Moisture Content	ppmw
Temperature	°C and °F
Water Dew Point	°C and °F
Sample Flow Rate	Status indication: Low-Good-High (<0.1 to >0.3 l/min)
Sensor Technology
Moisture Sensor Technology	Michell Ceramic Moisture Sensor
Calibration Range	-100 to +20°Cdp
Measurement Range	-120 to +30°Cdp (0.001 ppmw to saturation)
Accuracy	Dew point: ±1°C between -59.9 & +20°Cdp Moisture content: ±10% of reading Dew point: ±2°C between -60 & -100°Cdp Moisture content: ±20% of reading Analysis temperature: Accuracy ±0.2°C
Resolution	0.1°C between +20 and -80°Cdp 1°C between -80 and -100°Cdp
Temperature coefficient	Algorithm compensation
Operating Pressure	Max. 50 barg
Sample Flow	Up to 1 l/min (0.1 - 0.2 l/min recommended)
HMI
Keypad/Interface	Capacitive touch-screen through glass
Display	Vacuum fluorescent
Datalogging	A rolling maximum of 150 data logs is available Each log records time, date, moisture and temperature values for each channel 5 minutes minimum and 60 minutes maximum logging intervals can be set by the user
Communications and Output	Two non-isolated 4-20 mA per measurement channel 500 Ω maximum load Range and parameter settable by user Modbus RTU @ 9600 baud-rate Alarms: two volt free contacts per channel; one process value and one instrument status Also available via Modbus communications
Enclosure
Type	Flameproof EExd
Construction	Cast copper-free aluminium (IP66/NEMA 4)
Finish	Chromate primer, Polyester P9010 powder coated (black). Meets BS3900
General
Sample Connections	1/4" NPT (female)
Weight	22.5kg
Operating Supply Voltage	90 to 260 V AC, 50/60 Hz, 180 W Main Unit
Operating Environment	-20 to +60°C up to 95% RH Indoor or Outdoor, shaded location
Certification
Hazardous Area Certification	ATEX Certification: II 2 G Code: EEx d IIB + H2 T4 (135°C) IP66 Tamb -40 to +60°C CCSAUS approved: Div 1, Class 1, Group B,C,D GOST Ex
Pattern Approval	GOST-R, GOST-K
Remote Interface Optional for indoor safe area installation
Host Capacity	Up to 31 Michell EExd Process Area Installation Instrumentation Range analysers in any combination of models via Modbus
Display	Backlit color 15cm LCD
User Interface	Integral mouse, on-screen keyboard
Function	View and modify analyser operating settings Record parameters to file and view virtual chart recorder analyser diagnostics
Ports	LAN, USB2, Modbus Re-transmission
Data Download	CSV (comma separated variable) format for easy import to ExcelTM
Remote Access	OPC (OLE for Process Control) over a LAN Embedded web page/unique IP address for PC access Remote data reading via Modbus RTU
Power Supply	100-280V, 50/60Hz
Plant control integration	ActiveX components to be used by software programmers for integration of Modbus protocol into a general plant software system

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