The EasyTREK and EchoTREK high-performance level transmitters are based on NIVELCO’s 35 years of experience with ultrasonic level measurement. Whether for liquid level measurement in sumps or tanks, for tank contents measurement, or open channel flow measurement, EasyTREK & EchoTREK transmitters provide the answer. Installed on the tank roof, or above the liquid surface to be measured, the transmitters give analog output proportional to liquid level or transmit HART® digital data. The EchoTREKis an intelligent compact ultrasonic level transmitter with 4 – 20 mA output offering HART® protocol as option. Local reading is ensured by a plug-in display which can be removed if displaying is not needed. Four keys provide for programming, both display and keys are located under a removable cover. The unit is tank-top mountable only. The EasyTREK high-performance level transmitters are IP68 rated units that have their transducer and processing electronics incorporated in one single housing. The EasyTREK transmitters utilize HART® (HART® 7 in case of SP-500 series) communication so they can be used in multidrop systems connected to MultiCONT process controller/display, or to a PC with the help of the UNICOMMHART®-USB modem or similar. The transmitters can be connected wirelessly to a PC with the SAT-504 Bluetooth® HART® modem. The members of the new EasyTREK SP-500 series can be recognized from the more compact size, the increased maximum measuring range, and the decreased minimum measuring range and can be remotely programmed also with Handheld Field Communicator. Both models can be used in multi-drop systems connected to NIVELCO’s MultiCONT process controller/display, or to a PC with the help of the UNICOMM HART® USB / RS485 modem or similar. EasyTREK and EchoTREK are available with measurement ranges up to 25 m (82 ft) providing wide application possibilities. Both ultrasonic level transmitters are using NIVELCO’s established SenSonic range transducers with a full beam angle of 5 to 7 degrees connected to the intelligent electronics featuring the QUEST+ advanced signal processing algorithm.
The ultrasonic level metering technology is based on the principle of measuring the time required for the ultrasound pulses to cover the distance from the sensor to the level to be measured and back. The echoes bounced back from the surface of the medium to be measured reach the sensor surface after the time of flight of the ultrasonic impulse. The time of flight of the reflected signal is measured and processed by the electronics, and then this is converted to distance, level, volume, or flow proportional data with the help of the customizable tank dimensions or the pre-programmed flume/weir parameters. The intelligent QUEST+ process adaptive signal processing software system ensures that the electronics identifies and validates the liquid surface signal, giving reliable level monitoring.