The IMP IS is an intrinsically-safe 2-wire configured alternative to the IMP+ ultrasonic level sensor, and is used for high accuracy level measurement of slurries and liquids. The IMP IS is designed to be mounted above a tank or solid container and uses state of the art echo extraction technology for within 0.25% or 6mm (whichever is greater) of the correct level.
A 4-digit LCD display is located on the top side of the unit, alongside a 4 button tactile keypad for parameter entry in 'Program Mode' and as hot keys for additional information in 'Run Mode'. The IMP IS can show level, space and distance on the display.
The IMP IS is I.S. certified to ATEX EEx ia IIC T4 and IECEx. The enclosure of the IMP IS is IP67 protected against dust and liquids, and 2 off 4.5 to 10 mm M16 cable entries/glands are provided for sealed connection of the unit to ensure moisture protection is maintained. The IMP 3 and 6 variants have a 1.5" BSP/NPT mounting, while the IMP 10 features a 2" BSP/NPT thread mounting.
The measuring range of the IMP IS varies depending on the selected model. The IMP3 measures from 0.2 to 3.0m, IMP6 measures from 0.3 to 6.0m and IMP10 measure from 0.3 to 10.0m. All models have a beam angle within 10 degrees (inclusive) and can be set up as 2 or 3-wire operation.
The unit can be programmed on-board in a password protectable 'Program Mode' using the onboard LCD display and keypad, or configured using the IMP PC software via an RJ11 port to the onboard RS232 connector.