Filling Level

NIVOSWITCH is used for level detection, overfill protection, leak detection or dry run protection of pumps. It is suitable for most liquids such as lime milk, solvents, oil, wine, etc. These detectors apply the principle of the tuning fork vibrating at a predetermined resonance under piezoelectric excitation. When in contact with the product, the frequency varies and causes the output relay to switch. This simple and robust measurement system NIVOSWITCH, operates independently of the chemical and physical properties of the liquid. It works in difficult operating conditions as it is not affected by conductivity, clogging, turbulences, flows and air bubbles. The sensor does not require any adjustment even with the change of liquid, or maintenance; It is supplied with one or two contact outputs.

• Compact models for liquids
• 1 or 2 changeover contacts
• Continuous auto-diagnostic
• Unaffected by liquid properties
• Unaffected by turbulences

NIVASWITCH is a liquid level detector. It is mainly used for overfill protection, leak detection or dry run protection of pumps. NIVASWITCH is easy to use and can detect most liquids. It works independently of electric conductivity, clogging, turbulences, flow-rate and air bubbles. The trigger point depends of the immersion depth. Robust and compact, NIVASWITCH may be mounted vertically or horizontally. Easy to install, it does not require maintenance. Status of output is indicated by a bi-color (LED) and a function test is performed with a magnet. The alternative current output or digital output (NPN or PNP) can be connected to a PLC. As an option, the relays PKK (data-sheet 251-02) or LC1, allow to convert the output as a potential free contact signal.

• Detection of level for liquids
• Continuous monitoring
• Operating even with turbulences
• Unnecessary calibration routine
• Operating even with suspended solids

BAMOSWITCH is a limit switch for use in containers and collection pans for electrically conductive liquids. The device is suitable for use with electrically conductive liquid whose impedance is up to 5 kOhm or whose coupling capacitance to earth is more as 50 pF. The liquids must not form insulating or conductive deposits. BAMOSWITCH has two operating modes: MAX: the output contact remains closed as long as the sensor tip is free and MIN: the output contact remains closed as long as the sensor tip is touched by the liquid.

• All-plastic version
• For electrically conductive media
• Compact design
• Insensitive to shocks
• Calibration free

Magnetic float level switches are used for level detection of liquids in all types of tanks. They are perfectly suitable for use in condensate tanks, base tanks, storage tanks or to provide an alarm for low levels of lubricating oils or fuels. The NIVOMAG is a compact stainless steel switch. Detection: A non-contact coupling system is realised by the permanent magnet of the float placed in the tank that can activate the microswitch situated in the housing mounted on the outside. Therefore, the unit does not require external power.

The variety of both top and side mounted versions, makes it easy to install the switch in any tank at any location. For the simplest level switching you can select models with fixed hysteresis, while for level control application we propose Nivomag with adjustable hysteresis. All parts in contact with the fluid are made of stainless steel. Models with rubber or silicon sleeves can be applied for contaminated liquids. This sensor is suitable for applications up to 25 bar and 250 °C.

• For level of liquid on any kind of tanks
• Versions for neutrals, alkali or acidic fluids
• Versions for side or top mounted
• Fluid temperature: 250 °C Max.
• Explosion proof version available

The alarm unit NivOil-CU (BVS 07 ATEX E 090) monitors levels in oil/water separators, up to three detection probes.

The oil layer thickness probe NivOil-OP/.. (BVS 07 ATEX E 091 X) detects the thickness of hydrocarbons fluids layer floating over the water.

The overfill probe NivOil-HP/.. (BVS 07 ATEX E 092 X) detects the overfill level in the separator. This alarm can inform that drainage is blocked.

The sludge level probe NivOil-SP/.. (BVS 09 ATEX E 021 X) detects the highest permissible level of sludge layer. As soon as the sludge level has reached the too high level an alarm signal is triggered.

All detection loops are automatically set up (self recognition). Therefore it is possible to connect any of the three intrinsically safe NivOil probes to any of the three intrinsically safe channels of the NivOil alarm unit. The alarm unit NivOil-CU detects for each channel which probe is connected and indicates the corresponding LED on the front panel. If a channel is not assigned, its LEDs remain dark during operation. The unit has a built-in audible alarm (piezo); If necessary, it can be disabled through a DIP switch.

• Synoptic board of alarms on the front
• Automatic sensor recognition
• 3 Output relays, change-over contacts
• Audible alarm (buzzer)
• Type-tested according to ATEX

Autonomous alarm unit for monitoring oil-water separators according to EN 858. A BBS system includes alarm unit NivOil CU/12 and a Solar panel to charge a battery, protected against excessive discharge or overload. NivOil is powered hourly, for 3 minutes, to check for a fault and alarm condition. In case of occuring an alarm, signal is emitted or through a flashing light or through a GSM module. The working time without sunlight is about 12 days at any period of the year for a reliable monitoring even without sun shining days (referring to Greenwich latitude).

With the option flashing light, an alarm corresponds to an intermittent light emission (of a Xenon bulb) on the outside of the cabinet. This option is recommended to avoid connecting the NivOIL contact outputs far-away minimizing the cost of installation.

With the option GSM, the alarm is transmitted on long distance through a SMS message: idoneous when the system is installed in a remote location. The message SMS sent, indicates the BBS identification, the alarming channel (probe) and a pre-recorded message.

The cabinet may be mounted on a wall or on a poll (Yoke U-Bolt Kit provided). The solar panel, with its own fixing system, is adjustable regardless of the position of the cabinet. The BBS must always be mounted outside the hazardous area. Only NivOiL probes can be installed in the hazardous area.

• Monitoring of oil-water separators
• Autonomous complete system
• Field installation
• Alarm signal: or flashing light or GSM
• Battery protection against discharge and overload

Level monitoring of hydrocarbon liquids in oil-water separators. RAC 531 signals the status of complete system with 3 LEDs. An audible alarm is integrated into the unit. The buzzer can be disabled by the user. The alarm unit has an auto-diagnostic of the probe, detection loop and of its own integrity. The probe NivOil OP/... detects the hydrocarbon liquids thickness floating over the water. Part numbers: 531950, 531101, 531102.

• Detection of layer thickness of
• hydrocarbon liquids
• Relay output, change-over contact
• Audible and lighting LED alarms
• Easy installation
• Agreement: ATEX II 1 G Ex ia IIB T4

For monitoring the grease layer thickness in separators according to EN 1825-1, EN 1825-2 and 4040-100. GAD 531 and probe GP/10 are designed for monitoring grease-water separators. The probe GP/10 detects when the thickness of floating grease is overpassed.The GAD 531 signals the status of the system with 3 LEDs: Normal operating - Current alarm - Alarm occured; Still not reset. The alarm device has an auto-diagnostic of the probe, detection loop and of device integrity. An audible alarm is built-in the unit. The buzzer may be disabled through a jumper if necessary. Components of one system are Alarm unit GAD 531 and Detection probe GP/10 (cable output, 10 m long). Caution: Not suitable for greases in emulsion neither semi-solid / solid aggregates. 531960 and 531980.

• Compact and economical model
• Monitoring of grease-water separators
• Relay output; Changeover contact
• Audible and lighting LED alarms
• Cable break and short circuit monitoring

Level control Min. or Max. of highly resistive conductive liquids: Demineralized water (5 to 20 MOhm), Glycerine (1 MOhm), etc. The RXM detects the difference of resistance between the detection electrode and the reference electrode when the liquid comes into contact. The reference can be the wall of the metal container or a second electrode. To carry out this detection, a DC voltage of 12V is applied between the electrode and the reference. The value of the resistor to detect varies according the liquid and distances to cover between the electrode and the reference. 533100.

Limit detection adjustment: The detection limit of the RXM is defined as the maximum value of the resulting resistance of the product for which the detection can occur.
- The detection limit is adjustable between 4.7 to 100 MOhm.
- Take care to use the specific coaxial cable to connect the electrodes to the relay RXM.
- The detection limit potentiometer is accessible after taking off the transparent plastic lid.
Resistive probes: Choose the right probe according to operating conditions and the chemical compatibilities (liquid, pressure, temperature, etc.).

BAMOLEAK allows to secure work areas where leaks are prejudicial for equipments, by detecting and precisely locating leaks of conductive liquids. APPLICATIONS: Building automation, Datacenters, Semiconductor Industry, Clean rooms, Archives storage / Libraries / Museums, Heating and air conditioning systems, Switching centers, computers room.

The sensor (cable) is laid along the monitored area or pipeline, and, connected to the evaluation unit. Leakage is detected by the converter, which determines, records and reports information via the analog output, relays and the RS485 Modbus interface. Two complementary detectors can be connected to the converter such as MAXITOP LWC (Detection in double-walled tank) or LWC-B (Local floor detector). Note: BAMOLEAK can locate one leak at a time.

• Leak localization
• Length up to 3,000 metres (12 areas)
• Automatic recognition of loop parameters
• Event recording (date / time)
• Outputs: 4-20 mA, MODBUS RTU, relays

The MAXIMAT VK C are level limit switches which are used for containers of water-polluting liquids to prevent an overfilling; When liquid lift up, the integrated electronics reacts to the float rising and its permanently output signal is interrupted; By interrupting the signal once the permissible limit of filling is exceeded, the associated system control may interrupt the filling process and acoustically and visually trigger an alarm.

The MAXIMAT SHR CS measuring transducer is used as power supply, current band monitor and alarm relay. It serves in combination with the overfill sensors and leakage sensors included in the MAXIMAT VK..., MAXIMAT LW... and MAXIMAT C... series, as well as MAXITOP... limit switches, as part of overfill inhibitors and leakage detection systems.

MAXIMAT TC4 is a signaling device for up to 4 overfill prevention devices or leakage detectors of MAXIMAT C ... series, with optical and acoustic signals according to the approval principles for overfill prevention devices.

The sensor MAXIMAT LW VK is designed to detect conductive liquids non-electrically conductive. The detection results from the position of a magnet inside the float and a Reed contact inside the probe. It is necessary to use it with a SHR C transducer. The liquids may not generate deposit originating jamming of float.

The MAXIMAT CST is used for delivering power supply to the: MAXIMAT C ..., MAXIMAT LW ..., CAPSYTRON series. A signaling, control and/or actuating device can be activated with the relay output.

MAXIMAT TC1 is a signaling unit for overfill and leakage detectors MAXIMAT (X series) and MAXITOP. The detector is powered directly by TC1 unit. The built-in buzzer provides local alarm to the operator, and the LEDs inforrm visually about the alarm status. The audible alarm is acknowledged through the push-button on the right side.

MAXIMAT TC1-B is an optical and audible alarm unit for dry-contact detectors. The built-in buzzer provides local alarm to the operator and the LED inforrm visually on the alarm status. The audible alarm is acknowledged with the push-button on the right side.

The MAXITOP monitors the overfilling of a tank with electrically conductive, non-flammable liquids, even highly aggressive liquids. Example : Storage tanks for caustic soda (NaOH), hydrochloric acid (HCl), etc. The detector MAXITOP is designed to prevent overfilling of tanks. It detects conductive liquids (acids, alkalis) with a reactance below 5 kOhm and a coupling capacitance towards ground of more than 50 pF. In no case should liquids form insulating or conductive deposits. The MAXITOP has 4 different possible interfacing connections:
• Direct connection to a 4 channels alarm unit MAXIMAT TC4 or 1 channel unit MAXIMAT TC1.
• Direct connection to a PLC.
• For relay output and loop diagnostic with a MAXIMAT SHR.
• For relay output with a MAXIMAT CST.

The MAXITOP LWC-B is ideal to give an alarm when a leakage occurs on the floor of retentions or collecting areas. With its fail safe detection loop, it is permanently operational. MAXITOP LWC-B is designed to detect conductive liquids with a reactance of up to 5 kOhm/cm and when the coupling capacitance towards ground is more than 50 pF. The liquids may not generate electrical insulating or conductive deposit.

Direct reading of level in opaque and closed tanks, metal or plastic vessels. The MAGTOP instantly indicates the level of liquid contained in a tank, via a two-color magnetic ruler, flaps pivoting to the passage of the float in the measuring tube. According to mechanical strength and chemical compatibility, MAGTOP is well adapted to work with liquids such as hot water, oils, alkali and acids. Instrument is installed on the tank by lateral or axial fittings. When the distance between fittings is large, we integrate brackets on the measuring tube to afford the weight; they have to be fixed on corresponding tank brackets. MAGTOP are available in various models:
• MAGTOP 300 in stainless steel is suitable for lateral mounting on metal tanks.
• MAGTOP 400, 410 are designed to an axial installation over the tank.
• MAGTOP 801, 803, 806 (PVC, PPH, PVDF) are convenient for use with aggressive fluids.

MAGTOP D indicates instantly the level of liquid inside the tank, with a two-colour ruler with magnetic flaps actuated by the magnetic float inside the measuring tube. Design of this series allows the installation in hazardous area on storage tank for dangerous fluids, under pressure, with high temperature. For extreme operating temperatures we provide a complete or partial insulation (fiber glass fabric). Our MAGTOP D are made of stainless steel with lateral fittings, flanges or threaded fittings.

MAGTOP G5, magnetic flap indicators display on site instant level of liquid, available for control and remote signal. The devices are mounted on the side of tanks. The magnet in the float turns the plates of the magnetic flap ruler from yellow to red as the fill level rises.

Reading and control of liquid level in a tank; With level switches: Pump and solenoid valves automation, remote alarm signals. The GNR6 consists of a transparent PVC tube for direct viewing of the stored liquid level. Standard supply includes the stop valves to allow the disassembly of the measuring tube for cleaning maintenance. The measuring tube is in transparent PVC, O.D. 63 mm, which guides the magnetic float. On the bottom the PVC drain plug (union fitting) allows an easy introduction of the float into the measuring tube.
Option: Graduated ruler, PVC ruler, graduated in cm or on request in % or in volume. The ruler is fixed with PE clamps to the measuring tube. Accessories: Level switches BSM or BRK to send a remote signal on/off for alarms or automation of pump or solenoid valve.

Level controllers and indicators. Gauge for level display and filling control. Diesel in storage tank or day-tank. Stored lubricating oil, glycol water, rainwater. Particularly suited to meet the needs and conditions of use for storage tank or day-tank of diesel generators.

The electric gauge is mounted above the tank. Against the liquid height, the float transmits the level through an angle drive to a vertical stem. The stem actuates on a pointer associated with a graduated dial to display the level in the tank. Depending on the model, it can also act on contacts, and/ or a potentiometer which will deliver an ohmic value image of measurement. The instrument is available with several functions: 1 continuous signal output (Ohm), Display for direct reading of level. For commodity, the level is visible on 2 opposite sides. 1 to 3 contacts (potential free). The complete system is supplied ready to install and to use.

Semi-permanent level controller designed for instantaneous viewing of current level in a non pressurized tank. For storage tanks of diesel (height up to 5 m) and for storage tanks of water (Height up to 4 m).

The air inside the immersion tube is compressed when the piston of integrated pump is pulled and pushed. When the pressure balances the hydrostatic pressure (column of liquid), bubbles escape. The pointer on the gauge indicates the level on the dial. It is possible and easy to change the scale according the tank shape and its volume.

• Dial display 160x160 mm
• Semi-permanent indication
• Integrated check-valve
• Protected against overpressure
• Protected against backflow
• For tanks of any shape
• Scale in % or Volume (according tank type)

The MEMPRO works according to the hydrostatic pressure measuring principle. The output signal corresponds to the pressure of the atmosphere inside the measuring tube; The ceramic sensor is not touched by the liquid.

The MEMPRO S6.6 works according to the hydrostatic pressure measuring principle. The output signal corresponds to the pressure of the atmosphere inside the measuring tube. The ceramic sensor is not touched by the liquid. On site, with the automatic calibration function, the instrumend is paired to the tank size in a matter of minutes. Four trigger points can be assigned to level heights through the setting menu. All switching points have an adjustable delay time, an adjustable hysteresis and a switch.

EasyTREK is a high performance ultrasonic transmitter with integrated electronics into the housing. Positioned above the surface of the liquid to measure, the transmitter provides a signal proportional to the liquid level. The sensor is set up via the HART protocole. For multiple tank applications, EasyTREK may be operated via ancillary control systems compatible with this protocol HART 7 (examples: multichannel MultiCONT or PC or PLC). The MULTICONT can manage up to 15 transmitters EasyTREK. Data transmission is then possible through the RS485 interface of display unit.