SandAlert Lite 2
nd
Edition
Page
3
Figure 1 Schematic Diagram of the SandAlert Lite
3.1 Acoustic
Sensor
There are two transducers suitable for sand monitoring:
Pulsarguard 2011G
This sensor is the ‘G’ version, suitable for use with the inbuilt galvanic barriers of the SandAlert
Lite. The sensor transducer is housed in a robust cast Type 316 stainless steel enclosure. There are
two sensor variants available, the Pulsarguard 2011 sensor which is approved to EEx ia IIC T6, or
EEx ia IIC T5 for T
amb
up to 92 ºC.
Explanation of the IS approval description:
EEx
denotes a CENELEC approval.
ia
denotes the device is intrinsically safe category ‘ia’, and therefore is suitable for all
zones (0, 1 and 2).
IIB
denotes the gas group. Group IIB gases cover the majority of hydrocarbon gases.
T4
denotes the temperature classification. The surface temperature of the sensor will not
exceed 135 ºC under fault conditions with a 40 ºC ambient temperature.