(16)The flow rate transmitters of the EVS 3100 series are specially designed for use in hydraulic and other fluid power systems. They operate in accordance with the turbine principle, which means that the rpm of an impeller wheel rotating in the flow of the media is measured and converted into a 4 .. 20 mA analogue signal.
Two further G1/4 threaded holes in the turbine housing allow additional units to be connected, e.g. temperature and pressure sensors./Asset/Elec_FlwMtrs_EVS_3000_Gen.jpg
(8)The flow rate transmitters of the EVS 3100-H and EVS 3110-H series with HSI sensor recognition were specially developed for use in conjunction with the HYDAC measuring instruments HMG 5x0, HMG 2500, HMG 4000 and CMU 1000. For data transmission, the EVS 31x0-H has an HSI interface (HYDAC Sensor Interface).
The HSI sensors are recognized automatically via the HSI interface by the above-mentioned HYDAC measuring instruments, and all the necessary basic settings are taken from each instrument.
As is the case with all flow rate measurement transmitters of the EVS 3100 and EVS 3110 series, the EVS 31x0-H also operates in accordance with the turbine principle. The speed of an impeller turning in the fluid flow is measured and converted into an electronic signal./Asset/Elec_FlwMtrs_EVS_3000_HSI.jpg
(3)The HYDAC flow switches of the HFS 2000 series are based on a variable area float principle. The measuring medium deflects a springloaded float in the direction of flow, depending on the flow rate. A reed contact is fitted outside of the device, therefore separated from the fluid circuit. When the magnet inside the float reaches the pre-set position, the reed contact will switch.
To protect it from external influences, the reed contact is encapsulated in a housing designed to allow steplessly variable adjustment. The devices are designed to be capable of monitoring threshold values reliably, even when the viscosity fluctuates./Asset/Elec_FlwMtrs_HFS_2000.jpg
(7)HFT 3100 with HART interface is a compact flow rate transmitter with intrinsically safe or explosion proof specially developed for applications in hydraulic systems and other fluid power systems. For intrinsically safe the double approval in accordance with ATEX and IECEx enables universal, almost world-wide utilisation of the devices in potentially explosive atmospheres. As for the explosion proof approval with ATEX, IECEx and CSA also enables universal, world wide utilization of the device in potentially explosive atmospheres.
The current flow is determined by means of a sensor according to the turbine principle. In addition with the analogue 4-20 mA output of the measured value, digital communication is possible by means of the HART protocol.
Two additional SAE 6 threaded bore holes (or G1/4) in the turbine housing provide the flow rate transmitter with additional connection options, e.g. for temperature and pressure sensors./Asset/Elec_FlwMtrs_HFT_3100.jpg
