Simplified speed measurement in hazardous and safe areas
10 April 2017
A range of tachometers from BEKA associates offer speed measurement and display in both hazardous and non-hazardous areas.
Panel and field mounting models can be configured to function with most sensors, they have bold displays that simultaneously show speed and total time that the monitored machinery has been operating.
All models can be supplied with an internally powered display backlight, dual isolated alarms, a synchronous isolated pulse output and a 4/20mA isolated output.
Two sizes of panel mounting enclosure and display are available. All have IP66 front of panel protection and the range includes a model with a rugged 316 stainless steel enclosure and a toughened glass window for applications in severe or marine environments.
The field mounting tachometers have an IP66 impact resistant GRP case with stainless steel fittings suitable for use in harsh industrial environments, including off-shore applications.
In addition to general purpose tachometers, intrinsically safe models have ATEX, IECEx, US and Canadian certification allowing worldwide installation in gas and dust hazardous areas. For applications in Zone 2 or 22, Ex nA and Ex tc approval permits installation without the need for Zener barriers or galvanic isolators which significantly reduces the installation cost.
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