Level switches, based on the conductivity principle, can be applied to liquids with conductivity higher than 10 µS/cm. For detecting the level, probes are immersed into the tank. These probes (and the tank wall if conductive) serve as contacts of an electric circuit.
NIPRESS pressure transmitters working in 2- or 3-wire systems convert pressure (input signal) to direct current or voltage (output signal) proportional with the pressure. The wide choice of models provides possibility to complete almost all relative or absolute pressure measurement tasks requiring different accuracy. Their design, high overload capability and the possibility to install the units in any physical position allows for a wide range of industrial applications.
The NIVOCAP CK-100 series new generation capacitance level switches unlike the traditional capacitive principle they operate as capacitance meters in the RF (radio-frequency) range. The most advantageous feature of this technique is that the instrument has great build-up immunity, therefore the NIVOCAP CK-100 is an excellent choice for those adhering, sticky substances where the rival vibrating or the other contacting measurement technologies are not applicable. The mechanical construction consists of a stainless steel probe and a reference probe between two insulations. The intelligent microcontroller based electronics of the NIVOCAP CK evaluates continuously the voltage level proportional to the capacitance difference between the two probes and the housing. This way it provides more stabile measurement compared to the analogue capacitance switches. The units are available only with paint coated aluminium housing, because one reference point of the measurement is the housing itself. An insulated section of the probe called the guard-ring allows that the material build-ups on the probe can be ignored preventing false switching. The maximal probe length of the NIVOCAP CK series is 3 meter (10 feet) in case of the rod extended types and the cable extended versions can be ordered up to 10 meter (33 feet) probe length. The high temperature and the Dust-Ex approved models are suitable for using in harsh environments so they can be ideal choice for power generation applications.
The UNICONT PGK-301 Ex DIN rail mountable intrinsically safe isolator and power supply modules are suitable for providing power supply for 2-wire transmitters operating in hazardous applications, as well for isolating the input, output and supply voltage galvanically. Moreover the device perform high accuracy signal transmission between Ex and non-Ex areas. The data transmission can be 4-20/4-20 mA or 2-way digital HART depending on model type. The UNICONT PGK-301 Ex intrinsically safe isolators perform signal transmission to the non-Ex Zone with microprocessor controlled digital sign-processing which provides high transmission accuracy. This is a special demand in case of certified, high precision (for example magnetostrictive) transmitters. If fast conversion speed is necessary, the high speed types are recommended. The number of connectable transmitters is determined by the intrinsically safe limit data!
The NIVOFLOAT NW-100 type tilting float level switch is suitable for level switching of various liquids, especially sewage in shafts, tanks, basins or cisterns. The double-chambered float is made of injection moulded tough polypropylene that ensures good water-proof protection. The contacting microswitch is incorporated in the float. The cable of the NIVOFLOAT NW-100 level switch is fed through the water-proof passage and the monolithic structure of the injection moulded plastic housing. The cable of the level switch is a flexible insulated copper cable with 3x 1 mm2 (AWG 17) cross-section and PVC or Neopren outer insulation. Different control tasks such as liquid level monitoring and pump control can be realized successfully with NIVOFLOAT.