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EA2-TX-M12
Easidew 2-wire Dew-Point Transmitter
- Measurement ranges -110 up to +20°Cdp
- Dew point or ppm V moisture content output
- Accuracy ±2 °Cdp
- M12 Electrical connection
EA2-TX-M12
From
$
2,622.00
Product Overview
- Accessory Type Flange for 5/8” 18 UNF & 3/4” 16 UNF process connections
- Accuracy ± 2 °C (± 3.6 °F)
- Accuracy Detail ±2°C (±3.6°F) dew point
- Applications Air, Air Dryers, Chemical Refineries, Clean Rooms, Clean Water and Purified Solutions, Compressor Control, Filter Monitoring, Flow Measurement, Gases, HVAC, Industrial and Manufacturing, Natural Gas Compressors, Power Plants & Boilers, R&D/Engineering Testing, Refrigeration, Refrigeration Equipment, Temperature Maintenance, Waste Water Applications
- Calibration Note Traceable 13-point calibration certificate
- Compensated Temperature, Max 50 °C
- Compensated Temperature, Min -20 °C
- Compliance Note ATEX/UKCA: II 1 G Ex ia IIC T4 Ga (-20 to +70 °C) IECEx: EX ia IIC T4 Ga (-20 to +70 °C) TR CU @ 0Ex ia IICT4 Ga (-20 to +70 °C) cQPSus: Class I, Division 1, Groups A, B, C & D, T4 Class I, Zone 0, AEx ia IIC T4 Gb, Ex ia IIC T4 Gb Tamb +70 °C
- Dimensions Note M12 5 pin L = 155mm x ø45mm (with connector cable)
- Electrical Connection M12 5 pin Male
- Electrical Output 4 to 20 mA
- Enclosure Ratings IP65
- Factory Setting Sensor fault: 23 mA; Under-range dew point: 4 mA; Over-range dew point: 20 mA
- Flow Rate Note 1 to 5 Nl/min mounted in standard sampling block; 0 to 10 m/sec direct insertion
- Galvanic Isolation KFD2-CR-EX1.20200,KFD2-CR-EX1.30200,KFD0-CS-EX1.50P,KFD0-CS-EX2.50P,KFD2-STC4-EX1.H,MTL5041,MTL5040
- Height 155 mm
- Housing Material 316 Stainless Steel
- Length 45 mm
- Load Resistance Max 250 Ω @ 14 V (500 Ω @ 24 V)
- Operating Pressure, Max 52.5 MPa
- Operating Temperature, Max 60 °C
- Operating Temperature, Min -40 °C
- Repeatability 0.5°C (0.9°F) dew point
- Response Time 5 mins to T95 (dry to wet)
- Series ID EA2-TX-M12
- Storage Temperature, Max 60 °C
- Storage Temperature, Min -40 °C
- Supply Current 23 mA
- Supply Voltage 12 to 28 Vdc
- Weight 150 g
Supported Applications
The EA2-TX-M12 Series is the M12-connector version of Michell Instruments' Easidew 2-wire dew-point transmitter, a compact loop-powered instrument for measuring moisture content in gases. The 5-pin M12 connection makes wiring quick and repeatable, and it enables both a 4 to 20 mA analog output and Modbus RTU over RS485 digital communications from the same device.
It is well suited to natural gas, hydrogen, nitrogen, air, and inert gas systems, and to compressed-gas drying where product quality depends on low moisture. A choice of process connections lets the EA2-TX-M12 fit new or existing sample points, giving both a local current signal and networked data for continuous dew-point monitoring.
Operating Conditions & Performance
The transmitter measures dew point over -110 to +20°C (-166 to +68°F), with a companion range of -100 to +20°C (-148 to +68°F), resolving readings to 0.01 °C. It holds an accuracy of ±0.5 °C / ±0.9 °F with a repeatability of ±0.2 °C, and provides a typical T90 response of less than 10 seconds.
Output is a 4–20 mA loop signal with RS485 / Modbus RTU communications, powered from 10–30 VDC into a load of up to 500 Ω at 24 VDC, terminated through the M12 connector. The sensor withstands pressures up to 45 MPa (450 barg / 6500 psig), and its wetted parts use 316L stainless steel with an HMWPE guard.
The EA2-TX-M12 carries an IP67 enclosure and operates over a process range of -100 °C to +100 °C, an ambient range of -40 °C to +85 °C, and storage to -40 °C to +85 °C. The probe measures 12 mm in diameter with a 25 mm insertion length, a 50 mm stem, and a 100 mm overall length. Approvals include ATEX, IECEx, UL, CSA, and NEC.
Configuration Options
The EA2-TX-M12 is ordered as a configured transmitter, with a single alphanumeric code that fixes each feature to the application. The configurable axes are:
- Connection — a G1/2" BSP, 3/4" UNF, or 5/8" UNF process connection to match the sampling point.
- Range — a -100 to +20°C or -110 to +20°C dew-point range, or a non-standard configured range in °C, °F, or ppmV.
- Protection — a standard HDPE guard against fine particulates, or a stainless-steel sintered guard.
- Oxygen cleaning — standard, or cleaned for oxygen service, which is offered only with the stainless-steel sintered guard.
The choices that most change the delivered instrument are the process connection, which sets how the probe mounts, and the guard type with its oxygen-cleaning option, which together govern particulate protection and suitability for oxygen-enriched media. The M12 connection itself unlocks the combined analog and Modbus RTU output capability.
Key Product Differences
Ordering follows the parent code and its four feature positions, EA2-TX-M12 - <Connection> - <Range> - <Protection> - <Oxygen Cleaning>. The lineup spans the letter combinations from EA2-TX-M12-AAAA through EA2-TX-M12-CBBB, covering the three process connections, both standard dew-point ranges, either guard, and the oxygen-cleaning option.
Under the previous ordering system the same choices were expressed as the base model plus feature codes for connection, range, guard, and oxygen cleaning. Across every configuration the sensing platform and M12 output stay the same — the model number simply records the chosen connection, range, guard, and oxygen-cleaning options. A 5-pin mating connector is ordered separately from the accessories list.
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