Specialized 2-Wire Dew Point Transmitters
Design Simplicity & Economy
The key to the Easidew Transmitter’s performance is its sensor technology. Michell’s Advanced Ceramic Moisture Sensor is coupled with the latest microprocessor-based measurement circuitry to produce a fully calibrated and interchangeable transmitter. All calibration data is stored in flash memory, and so exchange or service can be accomplished in seconds. The Easidew Transmitter is simply disconnected, removed from its sampling block, and replaced by a new, fully calibrated unit. Ask your local sales representative for further details on the unique Service Exchange Program.
Advanced Technology and Michell’s Service Exchange Program
The key to the Easidew Transmitter’s performance is its sensor technology. Michell’s Advanced Ceramic Moisture Sensor is coupled with the latest microprocessor-based measurement circuitry to produce a fully calibrated and interchangeable transmitter. All calibration data is stored in flash memory and so exchange or service can be accomplished in seconds. The Easidew Transmitter is simply disconnected, removed from its sampling block, and replaced by a new, fully calibrated unit. Ask your local sales representative for further details on the unique Service Exchange ProgramFurthermore, the Easidew Transmitter forms the front-end for both the Easidew On-Line and Portable Hygrometers for total flexibility, interchangeability, and low cost of ownership.
2-Wire Connection Capability
The Easidew Transmitter can now be connected in a 2-wire loop powered configuration while maintaining complete backwards compatibility with all existing 3-wire installations. Easidew Transmitter is also fast to respond, ensuring that your process is always monitored in real time. The Easidew Transmitter is calibrated traceable to International Standards in Michell’s accredited laboratory at thirteen points over the range -100 to +20°C dew point (-148 to +68°F), to an accuracy of ±2°C dew point (±3.6°F). The inherent stability of our advanced Ceramic Moisture Sensor means that the Easidew Transmitter will give years of reliable operation.
Simple Operation for Air and Gas Quality Measurement
Easidew Transmitter is easy to install and operate. Powered by any dc source from 12 to 28 volts, it provides the user with a linear 4-20 mA signal. This output can be configured by the customer, using simple software, to represent any range within -100 to +20°C, or -148 to +68°F dew point, or 0 - 3,000 ppmV. Once the input and output connection is made, the transmitter only needs a sample of clean air or process gas and measurements can be taken.
As the Easidew Transmitter measures the water vapor pressure in the gas sample, it will give the user an accurate determination of the actual dew-point conditions presented to it – at any pressure up to 45 MPa/450 barg (6500 psig). Flow rate is not critical to measurement accuracy (1 to 5 Nlmin/2.1 to 10.6 scfh), though speed of response will be improved by operating a higher sample flow.
Rugged Yet Lightweight
The Easidew Transmitter is constructed in 316 grade stainless steel. A captive sealed, glaned cable connector offers IP66 (NEMA 4) protection from the environment.
This rugged construction makes it perfectly suited for industrial applications while, weighing only 150g (5.29oz), it is light enough to be supported directly by its connection to a 6 mm or ¼ inch sample pipe without any additional mounting brackets.
The microprocessor embedded within Easidew provides you with intelligent information on the failure mode. Sensor fault, under-range, and over-range conditions are all signaled by predetermined output levels so you can easily establish the source of the problem, rectify it and get back to operation as quickly as possible.
The Easidew Range
Michell offers a family of reliable hygrometer products based on our Advanced Ceramic Technology providing on-line and portable dew point measurement. All three products use the same transmitter platform for easy interchangeability. If you need to monitor various points in your process – some with local display, others with direct mA feed to a central control system, the Easidew range is ideal. The Easidew Portable Hygrometer allows local spot checks to be carried out at the point of use of the air or process gas. Easidew Online hygrometer provides a continuous in-process measurement of gas dew point. In order to maintain traceability, you only need to stock one sensor type for all three products – the Easidew Transmitter. Contact us for further information on the full Easidew Range.
Range: -100 to +20°C dew point (-148 to +68°F)
The Easidew Transmitters use Impedance technology, based on Michell’s ceramic sensor.
The Ceramic Sensor is constructed using state of the art thin and thick fi lm techniques. The operation of the sensor depends upon the adsorption of water vapor onto a porous non-conducting “sandwich” between two conductive layers built on top of a base ceramic substrate. The active sensor layer is very thin - less than one micron (about 0.00004 inches) and the porous top conductor that allows transmission of water vapor into the sensor is even thinner. Therefore the sensor responds very rapidly to changes in applied moisture, both when being dried (on process start-up) and when called into action if there is moisture ingress into a process.
Despite this extreme sensitivity to changes in moisture content, the Michell Ceramic Moisture Sensor is incredibly rugged due to the nature of its construction. To protect the sensor further against contaminants and pipe swarf it is housed in a protective sintered HDPE guard. All Michell Ceramic Moisture Sensors give <±2°C (±3.6°F) dew point accuracy and excellent long-term reliability and stability in process applications.The Easidew Transmitters use Impedance technology, based on Michell’s ceramic sensor.
Contact SilPac for Easidex Dew Point Transmitters