Item # Liquidew EExd, Liquidew EExd Explosion-Proof Moisture in Liquid Analyzers on Michell Instruments, Inc. Michell Instruments, Inc. - Item # Liquidew EExd, Liquidew EExd Explosion-Proof Moisture in Liquid Analyzers
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Liquidew EExd Explosion-Proof Moisture in Liquid Analyzers
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Liquidew EExd Explosion-Proof Moisture in Liquid Analyzers

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Liquidew EExd is a purpose designed certified explosion-proof solution to on-line continuous moisture measurement for petrochemical liquid applications. Liquidew EExd is installed directly in the hazardous area, simplifying site installation and retrofits. Moisture content is determined in part per million by weight (ppmW) through Henry’s Law from the measured water dew-point temperature and liquid temperature. The instrument uses an extensive list of saturation concentration data pre-programmed for a variety of petrochemical liquids, with provision for easy entry of ‘custom’ characteristics data by the user.



Main Unit - Measurement Parameters · Sensor Technology · HMI · Enclosure · General · Remote Interface (Optional for indoor safe area installation) · Hazardous Area Certification · Ordering Information

Main Unit - Measurement Parameters

Channel Configuration

Single and dual channel

Moisture Content

ppmW

Temperature

ºC and ºF

Water Dew Point

ºC and ºF

Sample Flow Rate

Status indication: Low-Good-High (< 0.1 to > 0.3 l/min (< 0.2 to 0.6 scfh)

Sensor Technology

Temperature Measurement

Michell Ceramic Moisture Sensor Thermistor.
Accuracy ±0.2ºC (±0.36ºF)

Maximum Operating Pressure

50 barg
725 psig

Calibration Range

-100ºCdp to +20ºCdp (-148 to +68ºFdp)

Measurement Range

-120ºCdp to +30ºCdp (0.001 ppmW to saturation) (-184 to +86ºFdp)

Sample Flow

Up to 1 liter per minute (0.1-0.2) recommended (2 scfh, 0.2-0.4 recommended)

Accuracy

Dew point: ±1ºC between -59.9 & +20ºCdp (±1.8ºF between -75.8 & +68ºFdp)
Moisture content: ±10 % of reading
Dew point: ±2ºC between -60 & -100ºCdp (±3.6ºF between -76 & -148ºF dp)
Moisture content: ±20 % of reading
Analysis Pressure: ±0.25 % FS.

Resolution

0.1ºC between +20ºC dp and -80ºC dp (0.18ºF between +68 and -112 ºF dp)
1ºC between -80ºC dp and -100ºC dp (1.8ºF between -112 and -148ºF dp)

Temperature Coefficient

Algorithm compensation

HMI

Keypad/Interface

Capacitive touch-screen through glass

Display

Vacuum fluorescent

Data Logging

Two non-isolated 4-20 mA per measurement channel. 500 Ω maximum load. Parameter and range selectable by the user.

Communications and Output

Modbus: RTU @ 9600 baud-rate
Alarms: Two volt free contacts per channel; one for process value Alarm status also available via Modbus communications.

Enclosure

Type

Flameproof EExd

Construction

Cast copper-free aluminum (IP66/NEMA 4)

Finish

Chromate primer, Polyester P9010 powder coated (black). Meets BS3900

General

Sample Connections

1/4" NPT (female)

Weight

22.5 kg
49.6 lb

Operating Supply Voltage

85 to 264 VAC, 47 to 63 Hz, 110 to 300 VDC, 180 watt

Operating Environment

-20ºC to +60ºC up to 95 % rh, Indoor or Outdoor, shaded location (-4 to +140ºF)

Remote Interface (Optional for indoor safe area installation)

Host Capacity

Up to 31 Michell EExd Process Area
Installation Instrumentation Range analyzers in any combination of models via Modbus

Display

Backlit color 15 cm/6" 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 Retransmission

Data Download

CSV (comma separated variable) format for easy import to Excel™

Remote Access

OPC (OLE for Process Control) over a LAN Imbedded web page/unique IP address for PC access. Remote data reading via modbus RTU.

Power Supply

100 to 280 V, 50/60 Hz

Plant Control Integration

ActiveX components to be used by software programmers for integration of Modbus protocol into a general plant software system.

Hazardous Area Certification
ATEX Certification: II 2 G
Code: EEx d IIB + H2 T4 (135ºC) IP66 Tamb -40 to +60ºC (-40 to 140ºF)
Certificate number: TRL06ATEX21093X
cCSAus approved: Div 1, Class 1, Group B,C,D
Certificate number: 1722693

Ordering Information

Channel Configuration

Liquidew Main Unit (LQD)
Single Moisture Measurement Channel (1N)
Two Moisture Measurement Channels (2N)

EExd Certified

ATEX Approved (AT)
CSA Approved (CS)

SAM-LQ LIQUIDEW EEXD Sampling Systems

SAM-LQD - Liquidew EExd Sampling System (S1/S2)
Single-Channel - Base version, mounting for indoor installation (S1)
Two-Channel - Base version, panel mounting for indoor installation (S2)

Base Version - Single Channel / Two Channel

316 Stainless steel enclosure, IP66 (NEMA 4) - single channel / two channel (A3/A4)
Panel mounted (indoor) - single-channel / two channel (C1/C2)
Stainless steel/304 enclosure, IP66 (NEMA 4) - single channel / two channel (A1/A2)

Heater / Thermostat (Available only with enclosure)

Enclosure cooling for hot desert climate installation - Available only with enclosure
Standard heater/fixed thermostat 20ºC (68ºF) - single channel / two channel (F1/F2)
Thermostatic heater, adjustable 0 to 50ºC (32 to 122ºF) - single channel / two channel (G1/G2)
Vortex Cooling for single channel / two channel - Instrument air supply required (H1/H2)

Trace Heated Sample Tubing

Trace Heated Sample Line Assembly - 3 meter (9.8 ft) length 6mm or 1/4" OD where X is length in meters (max 15 (49.2 ft)) . Seamless 316L stainless steel, 6 mm or 1/4” OD tube, fl or polymer self-regulating heating cable, glass fiber insulation, with PVC outer sheath. Factory assembled, wired and terminated into Sampling System enclosure (J1 .XX)
For Two-Channel version, add J2 .XX to order code (to specify and trace heated sample tubing for channel 2 (J2 .XX)

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