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ATEX compliant electronic pressure gauges from Keller

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article image Keller’s ATEX compliant electronic pressure gauges

Keller AG für Druckmesstechnik introduces five new ATEX compliant digital pressure gauges designed for use in areas subject to gas explosion risks.

The five intrinsically safe electronic pressure gauges are com¬pliant with the ATEX Explosion Protection Directive regarding ex¬plosive gases. The electronic design of these devices is trimmed to minimise energy consumption, so it is also possible to replace the batteries inside areas with explosion risks. Common features across all Keller digital pressure gauges include simple parameterisation and operation with only two buttons. The pressure display can be shown in various physical units that can be selected freely.

Model ECO 1 Ei is the simplest version and offers high resolution and reproducibility for both measuring ranges (-1…30 bar and 0…300 bar), together with accuracy (typical) of 0.5 %FS and an integrated min/max memory. The application range as per the ATEX directive is defined by identification marking Ex ia IIC T5 or T6.

Key features of Keller’s type LEO 1 Ei and LEO 2 Ei electronic pressure gau¬ges include microprocessor-assisted compensation ensuring an extremely narrow total error band (including temperature er¬rors) of only <0.2 %FS over the entire range of operating temperatures from 0...50°C; zero point selectable freely within the four measuring ranges between -1…3 bar and 0…700 bar; automatic switch-off function guaranteeing energy efficiency; sampling rates of 2 Hz; and integrated min/max memories. The application range as per ATEX is defined by identification marking Ex ia IIC T5 or T6.

The special feature of the LEO 1 Ei is its additional memory for peak values, which are often critical for the lifetimes of hydraulic plants.

Key features of the LEO type electronic pressure gauge, the LEO Record Ei include integrated data memory to record pressure and temperature progressions in the measuring medium; data transmittable via an RS485 interface to a PC for evaluation with the Logger 4.X software; ability to register pressures of up to 1000 bar with a total error band of ±0.1 %FS; and also available with a capacitive sensor for very low measuring ranges starting from 30 mbar (±0.2 %FS). The application range as per the ATEX directive is defined by identification marking Ex ia IIC T4.

Key features of LEX 1 Ei electronic pressure gauge include accuracy of up to 0.01% FS; specifically equipped with a 5-digit display for calibration and testing purposes; pressure measurement range between -1 bar and 1000 bar available; and min/max memory and a digital interface to generate PC protocols. The application range as per the ATEX directive is defined by identification marking Ex ia IIC T6. 

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