Martel BetaGauge 311A-EX and 321A-EX pressure calibrators for hazardous areas

The Martel BetaGauge 311A-EX (single-sensor) and 321A-EX (dual-sensor) pressure calibrators have hazardous area approvals that include IECEx and ATEX certification for worldwide use.

In addition to the approval to safely use the calibrators in hazardous areas without hot work permits, the EX versions include a ClearBrite graphic LCD with intense backlight for a crisp and easily read black-on-white display.

The familiar Martel 3-key user interface is supported by a multimode operating system that allows a range of operations from simple measurements to complex calibration applications such as natural gas custody transfer calibration.

The calibrators are available in the user’s choice of 25 available pressure ranges from 2.5 kPa to 68 MPa in compound, gauge, differential and absolute modes. The user can choose from 19 built-in engineering units and specify up to two custom units at the time of order.

The ability to measure up to 24 mA DC means these calibrators can perform a complete calibration on a pressure transmitter in the field. Accuracy on most ranges is ±0.025% FS, over a wide variety of ambient temperature conditions.

Applications include natural gas flow computer calibration, multivariable transmitter calibration, calibration of all types of process pressure instrumentation, and flow and level transmitters that use pressure-inferred measurement techniques. The calibrators also offer special features for the testing of pressure switches commonly used in safety instrumented systems and other control and monitoring applications.