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The SIEMENS SITRANS LH300 submersible pressure transmitter sensor for hydrostatic level measurement with protective caps made of PPE, stainless steel and ETFE. The SITRANS LH300 converts the level proportional hydrostatic pressure into a standardised 4 to 20 mA signal. The SIEMENS SITRANS LH300 submersible pressure transmitter consists of a stainless steel housing (Ø 30 mm) with mechanical protection IP68 and the piezo-resistive sensor with a ceramic diaphragm made of 99,6 % purity ceramic ensures versatile use, also good in drinking water systems. The transmitter cable has a diameter of Ø 8 mm and contains a vent pipe to connect to the atmosphere. The pressure transmitter measures liquid levels in tanks, containers, channels and dams. LH300 pressure transmitters are available for various measuring ranges and with explosion protection as an option.

The WIKA CPC2000 portable low pressure controller is used in the areas of heating, ventilation, air conditioning, filtration, clean room, and medical technology as a calibrator or as highly-accurate measurement equipment and/or precise pressure transducer. The WIKA CPC2000 low-pressure controller is a mains or battery-operated pressure controller with internal, automatic pressure generation and pressure reference. The pressure generation is achieved using an integrated, electric pump, which makes a positive and/or negative pressure available on both the tube connections. As soon as the instrument is switched on, a zero-point adjustment is automatically carried out, so that a zero-point drift is eliminated. The subsequent preparation of a calibration requires only a few settings. First, using the MENU button, select one of the stored pressure units and the variable pressure change step in the range of 0 … 50 %. Then, once the full scale has been entered in Control Mode, the pressure can be easily increased or decreased by the defined level using the navigation buttons. To check whether the calibration assembly or the test item has a leak, the LEAK button can be used. With this, the pressure is locked into the test assembly and any pressure drop there might be, as well as the the time this takes, is measured and displayed. The CPC2000 has an RS-232 and USB interface, enabling communication and data exchange with a PC. WIKA-Cal calibration software is available for the CPC2000. WIKA-Cal also offers, over and above PC-supported calibration, the management of the calibration and instrument data in an SQL database. The accuracy of the instrument is certified by a factory calibration certificate.