Hydrometric Level

Water level monitoring represents a fundamental issue when it comes to deal with the assessment of hydrological risks and the management of water resources. TLU ultrasonic hydrometric sensor is undoubtly an effective, affordable and reliable solution. It ensures excellent accuracy standards, thanks to a self-correction system of the hydrometric measurement. Indeed, by means of an integrated temperature sensor, it can easily take into account the variation of the speed of sound as a function of the density of the air. The measurement principle is based on the emission of an ultrasonic frequency impulse towards the surface to measure and on the subsequent reception of the reflected signal. TLU is a non-contact instrument. Furthermore, it allows to speed up and simplify the installation and maintenance steps. The sensor is supplied with power and signal cable (12m).

The sensing element consists of an absolute digital encoder which encodes each angular position in Gray code (at 25 Bits). Through the use of a microprocessor, the output is a signal proportional to the hydrometric level. The transducer belongs to the family of intelligent sensors as it is equipped with an internal micro-processor which performs, among other functions: control of correct operation, data pre-processing, A/D conversion of electrical signals, etc. These features ensure excellent accuracy and high data reliability. The sensor can be equipped with an interface for recording data on a memory card, to be downloaded locally on a laptop or to be collected for subsequent reading on site. The sensor can be accompanied by a Siap+Micros calibration certificate or by certificates issued by other external laboratories (SIT, Colonnetti, etc.). The body of the sensor is made of die-cast anodized aluminium, in order to guarantee an IP67 degree of protection. The transducer complies with the provisions of the European EMC regulations, is protected against overvoltages and fully complies with the prescriptions of the WMO (World Meteorological Organization).

TLRV radar technology is the most suitable solution for applications requiring high precision standards of measurement, as TLRV is a very performant device in terms of accuracy and resolution. The measuring principle is affected neither by variations in atmospheric temperature, nor by suspended dust between the sensor and the measured surface, ensuring a very reliable data acquisition even in harsh environmental conditions. The technology is based on the emission of a radar impulse towards the surface to measure, and on the subsequent reception of the reflected signal. The distance between the sensor and the surface is calculated through the time of flight the radar emission needs to reach the surface and go back to the sensor. TLRV is a non-contact instrument. Furthermore, it allows to speed up and simplify the installation and maintenance steps. The sensor is available with either digital (SDI12, RS485) or analog (current 4-20mA) outputs and it is supplied with power and signal cable (10m). TLRV stainless steel mounting bracket is available as optional accessory.

The ASTAID Siap+Micros hydrometric rod is made of hot-painted aluminum with high-contrast colors that allow excellent visibility of the graduated scale even from a distance. ASTAID is made in 1-metre modules with measurement indications every ten centimeters and reference notches every centimetre; to indicate each metre, the rod can be accompanied by a plate showing the desired measure. It is possible to install the staff in a vertical or oblique position using an aluminum profile which also allows fixing on surfaces that are not perfectly flat (e.g. rock). The assembly of the staff, and of the plate with personalized dimension, to the profile is carried out using self-tapping screws supplied with the supply and has a precision adjustment of ± 25 mm. The installation of the profile can be carried out using commercial M8 plugs.

The TLP sensor represents a reliable and precision solution in the field of hydrometric level measuring instruments that operate in contact with the fluid. The steel structure of which it is made guarantees a watertight seal for immersions up to 300 meters deep, ensuring maximum electrical and physical isolation from the fluid. The transducer element and the measurement electronics are contained inside the casing, which allows temperature compensation of the output signal, for an accuracy of up to 0.05% FS. The measuring principle is based on a piezoresistive sensing element which converts the hydrostatic pressure into an electrical signal corresponding to the hydrometric level. The TLP must be immersed and installed below the minimum water column envisaged and can be fixed on a vertical wall, on an inclined wall or on the seabed, depending on the type of seabed and the body of water to be measured. Furthermore, the sensor is sold together with the temperature compensated measuring cable, of various lengths according to the needs.

TEVAP has been developed in accordance with the WMO guidelines for Class A evaporimeters, and is a fundamental tool for determining the water balance in the agronomic and environmental fields.
The TEVAP evaporimeter is composed of a stainless steel tank, and a piezometric level transducer with the relative electrical outputs, in 4-20 mA current and in RS485 serial. Furthermore, TEVAP is supplied with an open-structure wooden support platform that allows air to circulate under the tank, keeping its bottom above ground level and also facilitating easy inspections at the base, without difficulty.
TEVAP, thanks to the piezometric sensor fixed to the bottom of the containment tank, allows measurements to be made with very high accuracy even on minimal level variations. Furthermore, the sensitive element consisting of a ceramic cell guarantees high measurement sensitivity, and the output value is determined by a polynomial compensation of the atmospheric pressure.