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This document serves as the core summary of the application solution for the MICHELL EASIDEW PRO IS Intrinsically Safe Dew Point Transmitter. It consolidates the equipment’s core specifications, applicable scenarios, model selection guidelines, typical configurations and real-world industry performance outcomes, highlighting its key advantage of intrinsic safety. It can be directly referenced for project reports, equipment selection filing and technical disclosure sessions. ##
I. Core Equipment Parameters (Key Technical Specifications)
Parameter Category | Specific Specifications | Remarks |
Measurement Performance | Dew point range: -110°C to +20°C dp Accuracy: ±1°C dp (from +20°C to -60°C), ±2°C dp (from -60°C to -100°C) Output units: Dew Point, ppm(v), ppm(w) | Suitable for precise trace moisture measurement under high and low temperature environments with fast and reliable response. |
Pressure Withstand & Process Media | Maximum withstand pressure: 450 bar. Compatible with various gases and non-polar liquids including natural gas, LNG, hydrogen and hydrocarbons; supports measurement after oxygen purging of sampling lines. | Compatible with high-pressure and complex media working conditions to fulfill measurement requirements of various stringent processes. |
Communication & Output Signals | 2-wire 4–20 mA analog output with configurable output values and fault alarm function (output jumps to 23 mA upon sensor failure). | Compact structure with easy wiring; directly connectable to DCS/PLC systems for centralized monitoring. |
Safety Certifications | Global intrinsic safety certifications including ATEX, IECEx, cCSAus, FM and TC TR Ex; marking Ex II 1G Ex ia IIC T6. | Intrinsically safe design applicable to Zone 0/1 hazardous areas, allowing direct installation in core explosion-risk zones. |
Additional Features | EN 10204 3.1 material certification; 5/8”–18 UNF mounting thread; stainless steel housing with IP66 ingress protection rating; supports traceable 13-point calibration certification. | Resistant to harsh environments and easy to mount; ensures measurement compliance while cutting maintenance and calibration costs. |
II. Core Applicable Industries and Scenarios
- Oil & Gas Industry: Natural gas processing & transmission, LNG production, CNG drying, pipeline dehydration and gas custody transfer metering, as well as humidity monitoring of process media in refineries (to prevent ice blockage and corrosion and maintain compliance with standards).
- Chemical Industry: Production of polymers (PE/PP/PET), humidity measurement of liquids and specialty gases in petrochemical processes, and catalyst protection (precise moisture control to preserve catalyst activity and stabilize product quality).
- Energy Sector: Hydrogen energy (hydrogen production & refueling stations), inert shielding gas for industrial heat treatment; capable of early warning against pipeline stress corrosion cracking (SCC) under H₂S environments to secure equipment safety.
- General Scenarios: Outlet monitoring of industrial gas dryers, trace moisture measurement of insulating gas in high-voltage switchgear, continuous online trace moisture monitoring for all Zone 0/1 hazardous areas, and compatibility with OEM and system integration requirements.
III. Key Model Selection Guidelines
1. Measuring Range Matching
The standard measuring range of -110°C to +20°C dp is recommended as the first choice. Pay attention to accuracy variations corresponding to target temperature intervals, which covers most industrial trace moisture measurement applications.
2. Output Selection
Adopt 2-wire 4–20 mA output for basic monitoring based on on-site control demands. Configure alarm parameters in advance if fault early warning functions are required.
3. Intrinsic Safety Compatibility
Verify the transmitter’s intrinsic safety certifications (ATEX/IECEx/FM, etc.) according to the classification of on-site hazardous areas (primarily for Zone 0/1), and deploy certified safety barriers in matching applications.
4. Process Media Compatibility
Select matching material configurations based on measured media (gas/liquid, corrosiveness, temperature). Complete pipeline cleaning in advance for measurement under oxygen-containing atmospheres.
IV. Typical Configurations & Practical Application Results
(I) Typical Configuration Schemes
Basic Configuration: MICHELL EASIDEW PRO IS transmitter + safety barrier + sample pre-treatment system (filtration ≤80 μm, pressure reduction ≤20 bar, constant temperature 20~50°C) + signal transmission module (for DCS/PLC connection).
Specialized Configuration: High-pressure adaptor fittings added for high-pressure working conditions; ultra-clean pre-treatment assemblies for electronics, chemical and high-purity gas applications; dedicated pipeline cleaning kits for oxygen measurement scenarios.
(II) Key Case Performance
1. Dryness Monitoring of Natural Gas Pipelines
Suitable for Zone 1 hazardous areas and working pressure up to 100 bar with stable measurement accuracy. It successfully predicts the trend of moisture ingress into pipelines and eliminates risks of leakage caused by stress corrosion.
2. Polyethylene Production
Stably controls water content of propylene feedstock at ≤1 ppm(v). Precise measurement maintains catalyst activity, extends catalyst service life and reduces product reject rates significantly.
3. Hydrogen Quality Control at Hydrogen Refueling Stations
Compatible with high pressure of 350/700 bar, stably maintains hydrogen dew point at ≤-40°C dp in compliance with GB/T 37244. Its intrinsic safety design ensures safe operation within flammable hydrogen hazardous zones.
V. Summary of Core Value
Featuring intrinsic safety, high precision, high pressure resistance and easy integration, the MICHELL EASIDEW PRO IS leverages Michell’s proprietary ceramic metal oxide sensor technology. It can be directly installed in core explosion-risk zones such as Zone 0/1, effectively resolving the pain points of trace moisture measurement in industrial hazardous environments. It delivers guaranteed production safety, improved product quality and lower maintenance costs, and meets global compliance requirements across multiple industries. As a benchmark preferred intrinsically safe instrument for industrial trace moisture measurement, it is especially ideal for stringent process scenarios demanding easy installation and high safety ratings.
