Start Italiana magnetostrictive level probes (XMT and SMT level probes) are intended for continious measurement of petroleum products levels (fuel and LPG), underproducts water level and temperature in tanks at petrol stations and storage depots.
The magnetostrictive level transmitters are based on the principle named Wiedemann effect and enable continuous and highly accurate reading of liquids’ level.
The XMT or SMT lever transmitter consists of a microprocessor based electronic circuit placed inside one aluminium case head and a stainlass 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 define the position of the floats.
TECHNICAL CHARACTERISTICS:
GENERAL TECHNICAL DATA:
- Electronic Microprocessor.
- Remote diagnostic, maintenance and configuration.
- Easy substitution of the probe without extracting the rod.
- Tank connection: standard adjustable gland 2“ G-M (others on requests).
- Stainless steel rod AISI304.
- Enclosure protection IP68. (XMT version)
- Certification: ATEX CESI e INERIS – mark
- Computation of:
- product level in 0,1 mm;
- presence of water in 0,1 mm;
- average product temperature (up to 10 digital sensors)
- Standard measure precision: ± 0,5 mm
- Temperature precision among -20+70 °C range: ±0,2 °C
- Environmental temperature for explosion proof XMT: from -40 °C to 60 °C
Main features:
| Measurable product |
Gasoline, fuel, propane (GPL), water according to the float |
| Accuracy |
± 0,5 mm probe with serial output
± 1 mm probe with analogic output |
| Resolution |
0,1 mm |
| Repeatability |
± 0,1 mm probe with serial output
± 0,5 mm probe with analogic output |
| Power supply |
+9 V ÷ +30 V DC |
| Absorpion |
< 30 mA |
| Maximum load |
500 Ohm |
| Temperature accuracy |
± 0,5°C (for serial output probes only) |
| Temperature measuring range |
-25°C ÷ +130°C (for serial output probes only) |
| Temperature resolution |
±0,0625 °C |
| Ambient temperature |
-40°C ÷ +60°C |
| Explosion proof EX |
II 1/2 GD EEx d IIB T6 ATEX CE |
| Serial communication interface |
RS-485 |
Technical features:
| Body |
Ø 110 mm |
| Float |
Ø 50 mm (other dimensions on demand) |
| Shaft |
Ø 14/16/17 mm |
| Measurable height |
200 ÷ 120000 mm |
CONNECTION SCHEME:
Start Italiana probes can be connected either directly to a PC through an interface converter RS-485/RS-232 and intrinsically safe power supply unit (in case if used in explosive zones), or through a PTS controller over fuel dispensers and ATG systems for petrol stations. When using a PTS controller, it allows additionally to simulataneously control a big variety of fuel and LPG dispensers, used at petrol stations and storage depots.