Easidew TX I.S. with NEC Sample Block FM, CSA, ATEX Instrinsically Safe Certified Dew-Point Transmitter

An FM, CSA, ATEX intrinsically safe certified, 2-wire, rugged impedance dew-point transmitter for continuous measurement in hazardous area applications. Part number ESBx-NEC Sample Block is available as an option to the Easidew TX I.S. It comprises NEC Class 1, Division 1 & 2, Groups B, C, and D components for installation in hazardous areas.

Simple Operation
The Easidew TX I.S. is easy to install and operate. It requires a 12 to 28 V DC supply and provides a linear 4-20 mA signal representing moisture content.

Moisture in Gases
The output can be configured by the customer, using simple software, to any range within -100 to +20°C (-148 to +68°F) dew point, or 0-3,000 ppm_V in gases. As the Easidew TX I.S. responds to water vapor pressure in the gas sample, it will give the user an accurate determination of the actual dew-point at pressure up to 45 MPa (450 barg / 6500 psig). Flow rate is not critical to measurement accuracy (1 to 5 Nl/min (2.1 to 10.5 scfh)), though speed of response will be improved by operating at a higher sample flow.

Moisture in Liquids In addition to its moisture in gases capability the Easidew I.S. can be used to monitor moisture in non-polar liquids. It is factory programmed to provide an output in ppmW. This requires the saturation constants of the liquid to be programmed into the transmitter either at the factory or by the user, using the application software, available as a free download.

Product Features

FM, CSA, ATEX intrinsically safe certified
2-wire loop powered connection
Dew point or ppm moisture content
IP66 (NEMA 4)
Wide measurement range, calibrated -100 to +20°C (-148 to +68°F) dew point
Operating temperature: -40 to +70°C (-40 to +158°F)

Technical Specification

Performance

Measurement range

-100 to +20°C (-148 to +68°F) dew point

Accuracy

±2°C (±3.6°F) dew point

Response time

5 mins to T95 (dry to wet)

Repeatability

0.5°C (0.9°F) dew point

Calibration

Traceable 7-point calibration certificate

Electrical Specifications

Output signal

4-20 mA (2-wire connection, current source)
User configurable over range

Output

Dew point, moisture content for ppm_V and ppm_W

Analog output scaled range

Dew point: -100 to +20°C (-148 to +68°F)
Moisture content in gas: 0-3000 ppm_V
Moisture content in liquid: 0-3000 ppm_W

Supply voltage

12 to 28 V DC

Load resistance

Max 250 Ω @ 12 V (500 Ω @ 24 V)

Current consumption

20 mA max depending on output signal

Saturation constants (For moisture in liquids measurements only)

6-point look-up table for saturation constants up to 3000 ppm_W over the temperature range 0 to +50°C.
Saturation constants for 8 common liquids can be programmed into the Easidew PRO I.S. via the application software. Alternatively the user can program saturation constants manually.

Operating Specifications

Operating humidity

0–100% RH

Operating temperature

-40 to +70°C (-40 to +158°F)

Operating pressure

45 MPa (450 barg / 6500 psig) max

Overpressure rating

x2 operating pressure 90 MPa (900 barg / 13053 psig)

Flow rate

1 to 5 Nl/min (2.1 to 10.6 scfh) mounted in standard sampling block; 0 to 10 m/sec (0 to 32.8 ft/sec) direct insertion

Temperature coefficient

Temperature compensated across operating temperature range

Mechanical Specifications

Ingress protection

IP66 in accordance with standard BS EN 60529:1992, and NEMA 4 in protection accordance with standard NEMA 250-2003

Hazardous Area Certificates

ATEX - II 1 G Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
FM - IS / I / I / ABCD / T4 Ta = +70°C
CSA - IS Class I Div I Groups ABCD T4
IECEx - Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)

Housing material

316 stainless steel

Transmitter dimensions

L=132mm x ø27mm (L=5.19" x ø1.06") (sensor only)

Filter (sensor protection)

Standard: HDPE Guard <10μm
Optional: 316 stainless steel sintered guard <80μm

Sensor connection and material

5/8" - 18 UNF
316 stainless steel

Weight

8 lbs

Interchangeability

Fully interchangeable transmitter