E490 Ex d 4-20mA Loop Powered Display

Sep 21, 2023

The E490 is a versatile 4-20mA loop powered Indicator, designed to display the process value, sensor range and loop current. Besides the focus on level, temperature and pressure applications, the E490 can also indicate many other engineering units eg. %, mA, RPM, L/min etc



Universal loop powered indicator.

♦ Input signal: Galvanically isolated 4 - 20mA with ultra low voltage drop < 1.5V DC, allowing easy installation in almost any 2-wire, 4–20mA loop.
♦ LED backlight circuit which can be powered from the loop (voltage drop 6.5V DC), it is separated from the input circuit.
♦ Create a custom measuring unit with max. 8 characters.
♦ Selectable engineering units for many different applications: L- NL- mL - M3- AM3- NM3 - mg - g - Kg - TON- OZ- GAL - USGAL - IGAL - lb - bbL- cf - CUFt - scf - p - rev - °C - °F - K - % - M - mm - CM - mtr - inch - Ft - SQFt – Yd - PSI - psig - mbar - MbARG - bar - barg – bara – PA - PAG - KPA – KPAG - MPA - INHG – mmHg - mmH2O - MH2O – INH2O- Ph – mV – mA - A - uS – PPM – RPM - custom unit or no unit.
♦ Saves time and improves flexibility with the touch-through-glass keypad: no need to open the front cover
♦ Familiar easy operation with the Fluidwell "Know one, know them all" configuration structure, saving time, cost and aggravation.
♦ Easy installation in spacious chamber and plug & play connectors.
♦ Durable high-grade stainless steel 316L Ex d enclosure withstanding extreme maritime conditions (optional).
♦ Key information at a glance as the display shows the actual value, measuring unit and loop current and a 10 segments bar graph.

Hazardous area information

The E490 is ATEX and IECEx, certified with an ambient temperature range of -40°C to +70°C (-40°F to 158°F) for the aluminium enclosure. Ambient temperature stainless steel enclosure: -40°C to +67°C (-40°F to 153°F).

ATEX markings:

Gas: II 2 G Ex db IIC T6 Gb.
Dust: II 2 D Ex tb IIIC T85°C Db.

IECEx markings:

Gas: Ex db IIC T6 Gb.
Dust: Ex tb IIIC T85°C Db.

CSAc-us / FM: Pending

Robust and weatherproof

The rugged die cast aluminum and the stainless steel 316L E-Series housings are designed to guarantee safety. It takes the E490 Explosion Proof Multi-Purpose Indicator beyond the legal requirements for hazardous areas. In the harshest environmental conditions including those found in deserts and maritime climates with extreme temperature fluctuations, the durable E-Series consistently delivers accurate measurements.


The E490 is extremely practical in use. The touch-through-glass keypad allows for a safe and effortless operation of all functionalities without having to remove the glass cover. The menu, display and navigation structure are designed according to the Fluidwell “know one, know them all” principle, which enhances easy and intuitive control of various Fluidwell totalizers, flow computers and other displays.

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