Start Italiana magnetostrictive level probes (wired and wireless level probes) are intended for continuous measurement of petroleum products levels (fuel and LPG), produced water level and temperature in tanks at petrol stations, tank farms and refineries.
The magnetostrictive level transmitters are based on the principle named Wiedemann effect and enable continuous and highly accurate reading of liquid’s level. The XMT-SI level transmitter consists of a microprocessor based electronic circuit placed inside one aluminium case head and a stainless steel shaft containing a wave guide placed inside the tank.
An high frequence electric impulse is transmitted through the electronic device. In the matching point with the magnetic field generated by the permanent magnet placed inside the float, a mechanic impulse is generated thanks to the magnetostrictive torsional strain. The mechanic impulse spreads through the wave guide to the speed of sound up to the sensor placed in the measuring head. The timing between the transmission of the going impulse and the return impulse exactly defines the position of the floats.
XMT-SI family are high precision measure instrumentation which are suitable to measure product level, water level and temperature in various type of underground and above ground tank, also placed in hazardous areas.
The XMT-SI family is intrinsically safe certified for 0 Zone and through an intrinsically safety barrier can be connected to console or PC positioned in a safety zone for having a complete control of the tank.
The following models are available:
XMT-SI-485 transmits data on the 485 bus. It can be configured for polling mode or push mode functioning based on the needing. It is externally powered by the communication bus.
XMT-SI-RF transmits data using a radiofrequency transmission with variable frequency depending on the level changes inside the tank. It is powered by a lithium battery positioned inside the probe and certified also for intrinsically safety. In order to grant the intrinsically safety of the transmitter, the battery must be replaced only by another one supplied by Start Italiana.
XMT-SI-TTL transmits data using a TTL interface for OEM applications. The associated instrument must be certified in case it is necessary to install the product in a certified zone.
XMT-SI-485-LOG transmits data on a 485 bus. It is configured for functioning in polling mode. Normally it is powered externally using a communication bus. If the external power is disconnected, automatically a battery placed inside allows to keep the probe working and stores the level changes in a non-volatile memory for subsequent download of the data possible on recovery of the main supply.
RS 485 serial door for multipoint connection:
TTL Interface for OEM applications:
RS485-LOG serial door for multipoint connection with internal battery for storage of data in case of missing external power supply or polling:
For all the types the measurement characteristics are:
CONNECTION SCHEME EXAMPLE
Start Italiana probes can be connected either directly to a PC through an interface converter RS-485/RS-232 and an intrinsically safe power supply unit (in case if used in explosive zones), or through a PTS controller for fuel dispensers and ATG systems for petrol stations. Using a PTS controller additionally allows simulataneous control over a large variety of fuel and LPG dispensers used at petrol stations and storage depots.
PHOTOS OF INSTALLATION AT PETROL STATION
|Start Italiana wired probe XMT-SI-485
Order code: XMT-SI-485
|Start Italiana wireless probe XMT-SI-RF
Order code: XMT-SI-RF
|Start Italiana wired explosion proof probe XMT-EXd
Order code: XMT-EXd
|Passive intrinsic safety barrier BRA-SI-P for wired probes
Order code: BRA-SI-P
|Wireless receiver/repeater for wireless probes|
Order code: WR-SI