The IMP+ is an all-in-one ultrasonic level sensor, suitable for high accuracy level measurement of slurries and liquids. The IMP 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. The unique design of the IMP+ allows it to be wired as either a 2-wire or 3-wire configuration.
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+ can show level, space and distance on the display.
The enclosure of the IMP+ 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+ 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.
When wired as a 3-wire unit, the IMP+ features a backlight on the LCD display , 0 to 10V analogue output (in addition to the standard 4-20mA output), 2 output relays (SPDT, 1A 30Vdc/ac), active and passive 4-20mA (2 wire includes passive only 4-20mA) output and power consumption with relays energised.
The two relays provided by the 2-wire configuration of the unit can be used for alarm or control functions and are based on fully programmable setpoints. The 4-20mA output (non-isolated in 3-wire mode) can also be connected to a remote chart recorder or PLC to monitor level, space or distance dependant on the measurement mode selected.
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.