Flow · Level · Pressure · Temperature · Water Quality · Metering

Electromagnetic flow meters measure the flow rate of conductive fluids and waste water. The measurement is independent of density, viscosity, temperature and pressure. Fluid conductivity must be greater than 5 µS/cm.

Applications: sludge and water treatment · civil and industrial waste control · industrial process water · chemical dosing control · energy generation and distribution · quarries and mining.

• SizeDN10 to DN2000
• Pressure rating0.6 / 1.0 / 1.6 / 2.5 / 4.0 / 6.3 MPa
• Process connectionFlange to GB/9119-2010
• StructureIntegrated, split or insertion
• LiningPTFE ≥DN25; neoprene ≥DN65; F46; polyurethane
• ElectrodePt; Hastelloy B/C; SS316L; Ti; Ta; WC
• Measuring tubeSS304
• Accuracy0.5% FS, 0.3 to 10 m/s; repeatability 0.15%
• Power supply18-36 V DC or 85-256 V AC, <8 W
• Signal output4-20 mA, pulse, RS485 Modbus RTU, GPRS
• ProtectionIP65 integrated or split; IP68 split

Installation governs accuracy. The meter is mounted at the low point of the run with the tube full, five diameters of straight pipe upstream and three downstream, and on the discharge side of a pump. Tungatech confirms the installation position on site before the meter is ordered.

Ultrasonic flow meters use acoustic vibration to measure flow without penetrating the pipe. Clamp-on transducers suit retrofit metering where the line cannot be broken. Doppler and open channel units suit drainage networks, channels and partially full pipes.

Clamp-on measurement requires a single, uniform, stable liquid with turbidity below 20 000 ppm and low bubble content, on a dense pipe of known material and wall thickness. Transducer placement is 10 diameters upstream, 5 downstream, and 30 diameters clear of a pump discharge.

Vortex flow meters apply the Karman vortex principle to measure gas, steam and liquid flow. They suit clean process lines where a magnetic meter cannot be used because the medium does not conduct.

• Diameter and typeIntegrated, split, flange clamp and flange DN15 to DN300; insertion DN150 to DN3000
• Measuring range7 to 50 m/s gas and steam; 0.7 to 5 m/s liquid
• Accuracy, flange±1.0% liquid, ±1.5% gas
• Accuracy, insertion±2.5% liquid, ±3.0% gas
• Repeatability, flange0.33% liquid, 0.5% gas
• Repeatability, insertion0.83% liquid, 1.0% gas
• Working pressure1.6, 2.5 or 4.0 MPa
• Medium temperatureNormal −25 to +150 °C; high −25 to +300 °C
• MaterialBody and vortex generator SS304, probe SS316L, transmitter shell aluminium
• Power supply24 V DC ±10%, or 3.6 V lithium battery
• Signal outputPulse, 4-20 mA two-wire, RS485 Modbus, HART
• ProtectionIP65, electrical connection M20 × 1.5

Turbine flow meters derive flow rate from impeller speed, which is proportional to fluid velocity. They are used for custody transfer and process control on clean liquids and gases.

• DiameterDN15 to DN300 (DN300 to DN1000 insertion)
• Working pressureDN15-DN200: 4.0 MPa · DN250-DN300: 1.6 MPa
• Medium temperatureStandard −40 to +100 °C; high −40 to +200 °C
• Accuracy±0.2%, ±0.5% or ±1.0%
• MaterialBody SS304, integrator aluminium
• Power supply24 V DC, or 3.6 V battery
• Signal outputPulse, 4-20 mA, RS485 Modbus RTU
• ProtectionIP65, M20 × 1.5. Explosion proof ExdBT6

Ultrasonic level transmitters measure the time of flight of an acoustic pulse to the liquid surface. No part of the instrument touches the medium, which suits sewage, chemicals and abrasive slurries. All three models carry built-in temperature compensation.

• Resolution1 mm
• Output4-20 mA and RS485 Modbus RTU
• ProtectionIP65 or IP68
• Operating temperature−20 to +60 °C
• HousingABS, PE or PTFE
• ConnectionM20 × 1.5

The AC3200E is a split unit and accepts two sensors, so it reports level difference across a screen or filter directly, and the calculation does not have to be done in the control system. The blind area sets the minimum distance between the transducer face and the highest liquid level. A tank filled above the blind area reports a false reading, so the mounting height is fixed at design stage rather than on site.

Radar level transmitters are unaffected by temperature, dust, steam or vapour, which makes them the choice where ultrasonic measurement fails. The 80 GHz FMCW radar gives a narrow beam angle, so the signal clears internal obstructions that would defeat a wider beam.

• Antenna beam angle3°
• Output4-20 mA and RS485 Modbus, HART supported
• Power14-28 V DC on 4-20 mA; 9-36 V DC on RS485
• ShellAluminium alloy or stainless steel
• ProtectionIP68
• Process pressure−0.1 to 3 MPa
• Maximum range120 m
• Minimum blind area10 cm

Ranges and temperature limits for the CD, CX, DG, WG, GY and SW variants are confirmed against the current APURE datasheet at enquiry stage, because the variants differ by antenna and process connection.

Magnetic flap level gauges work on the communicating vessels principle. The level in the measuring chamber follows the level in the tank, and a magnetic float rotates coloured flags on the indicator rail. Local indication needs no power, and a transmitter or switch can be added where a remote signal is required.

• InstallationSide, top, or special to order
• MaterialSS304; SS316; uPVC; PP; stainless with PTFE; steam jacket; electric heating; vacuum jacket
• Working pressure≤0.6, ≤1.6, ≤2.5, ≤4.0, ≤6.4, ≤10.0 or >10.0 MPa
• Signal outputNone; standard remote transmission; explosion-proof remote transmission; LED local display; HART
• Level switchNone; stainless or aluminium switch; explosion-proof switch
• Medium density≥0.8 kg/m³; ≥0.6 kg/m³; <0.6 kg/m³
• Working temperatureA: <80 °C · B: 80 to 180 °C · C: 180 to 500 °C

Hydrostatic level transmitters measure the pressure exerted by the column of liquid above the sensor, which is proportional to level. A silicon piezoresistive core and integrated circuit convert the millivolt signal to a 4-20 mA output that drives directly into a PLC or controller.

• Power12-24 V DC
• Output4-20 mA, 0-5 V, 0-10 V or RS485 Modbus RTU
• Medium temperature0 to +40 °C
• ProtectionIP68
• Overload200% FS
• Accuracy0.5% standard, 0.2% available
• Stability±0.2% FS per year
• Vibration20 g, 20 to 5000 Hz

A float level switch starts and stops a pump as the water level changes. It is the cheapest reliable level control on a sump, borehole storage tank or reservoir where a continuous measurement is not needed, and it is commonly fitted alongside a continuous transmitter as an independent high or low level trip.

• Rating15 A, 110 to 250 V AC
• Plug stylePiggyback
• Dimensions103 × 78 × 44 mm
• CablePVC jacketed, length to order
• CasingMoulded polypropylene, corrosion resistant, PP cable gland
• DutyRated to 1 000 000 cycles

A float switch wired as the only level control leaves the pump unprotected when the float fouls or the cable tangles. Tungatech specifies the switch as an independent trip behind a continuous measurement wherever the pump is unattended.

Pressure transmitters convert process pressure to a 4-20 mA, voltage or digital signal. All models use a 316L stainless steel isolation diaphragm, and are selected on pressure range, medium temperature and the area classification of the installation.

• Output4-20 mA, 0-5 V or 0-10 V
• Power12-24 V DC
• DisplayLED or LCD optional
• Overload2× range below 10 MPa, 1.5× above 25 MPa
• Vibration20 g, 20 to 5000 Hz
• Sampling20 per second
• ProtectionIP65
• Temperature drift0.5% FS maximum, zero and sensitivity

Differential pressure transmitters measure the difference across two process connections. They are used for level in closed and pressurised vessels, filter condition monitoring, and flow across an orifice plate.

• Power12-24 V DC
• ProtectionIP65
• Vibration20 g, 20 to 5000 Hz
• Sampling20 per second
• Insulation100 MΩ at 250 V DC
• PCM950 certificationEx d IIC T6 and Ex tD A21 T80 °C

The PCM950 is the model to specify where the measurement drives a control loop that must hold over years rather than months. Its 0.075% FS standard accuracy and single crystal silicon element hold calibration far better than diffused silicon under thermal cycling.

A Bourdon tube gauge on copper alloy internals fails quickly on media that attack copper. Where the medium is aggressive, the YTP diaphragm gauge isolates the movement from the process. Tungatech checks medium compatibility against the wetted material before a gauge is ordered.

Temperature transmitters convert a platinum resistance signal to a standard current or digital output. The sensing element is Pt100 or Pt1000. Selection turns on the area classification, whether local display is needed, and the insertion depth the process allows.

• SensorPt100 or Pt1000
• Power12-24 V DC
• Casing diameterØ8 to Ø16, customisable
• Insertion depthTo order
• ProtectionIP65
• Long-term stability≤0.2% FS per year

• ElementPt100 or Pt1000
• Measuring span−100 to 300 °C in normal production service
• Error limitGrade A: 100 ± 0.06 Ω at 0 °C
• Allowable current≤5 mA
• Response time<30 ms
• Insertion depth10 mm to 500 mm
• Insertion diameterØ8, customisable
• Dielectric strength100 MΩ at 250 V DC
• Long-term stability≤0.2% FS per year
• ProtectionIP65, Hirschmann connection, customisable

An online controller takes the sensor signal, displays the measured parameter, drives relay alarms at high and low set points, and outputs 4-20 mA or RS485 Modbus to a PLC, SCADA or telemetry system. One controller family covers every parameter below, which keeps the spares holding and the operator training to a single interface.

• Relay alarm1 to 3 relays, high and low point trigger
• Output4-20 mA and RS485 Modbus RTU
• Power100-240 V AC or 24 V DC, 50/60 Hz
• ProtectionIP65
• CalibrationTwo-point
• MountingWall or panel
• Temperature compensationPT1000, NTC10K or manual
• Panel sizes48×96, 96×96 and 144×144 mm

Digital sensors hold calibration data in the sensor head and output RS485 Modbus directly, so a sensor can be swapped without recalibrating the controller and cable runs can be extended without signal loss. Where a plant runs more than three or four parameters, the digital range removes most of the wiring and the recalibration work.

Sensor bodies are typically POM, PVC or SS316 with a 3/4" NPT thread, 12-24 V DC supply, RS485 Modbus RTU output, IP68 protection and 5 m of cable as standard. Cable length, thread and wetted material are confirmed per application.

On any fouling duty, the cleaning arrangement decides whether the measurement is still true three months after commissioning. A sensor without a cleaning brush or flow cell on wastewater drifts, the operator stops trusting the reading, and the installation stops being used. Tungatech specifies the cleaning arrangement at the same time as the sensor.

A high precision three phase CT/VT or CT connection smart meter with modular design, used in power plants, high voltage substations, distribution substations, exchange points on transmission lines, commercial entities and industry.

The communication protocol is DLMS/COSEM compliant and certified by the DLMS User Association. The meter works with the corresponding current transformer, voltage transformer and low or high voltage circuit breaker with shunt release and motor operating mechanism, and carries flexible communication ports for remote management and reading.

A revenue meter is only as accurate as the current transformer feeding it. Tungatech specifies the CT class and burden against the meter class and the actual secondary loop, and verifies the installed ratio and phasing at commissioning before the point is accepted for billing. Specification reproduced from the VeryCo VC3100CT datasheet dated October 2024.

A split meter separates the metering and switching body from the customer interface. The meter body sits in the supply position, outside the tenant's reach, and the keypad or display unit sits inside the premises. The customer buys credit and reads consumption without access to the metering element, which removes the most common route to tampering and to disputed readings.

Where it applies: residential estates and flats · landlord and tenant submetering · student and staff accommodation · shopping centres and market stalls · site offices and temporary supplies · any point where consumption must be recovered from an occupant rather than absorbed.

Model designations, current ratings, prepayment standard and communication options are confirmed against the current VeryCo datasheet at enquiry stage, because the range differs by phase configuration, connection type and the vending system in use. Send the supply arrangement and the number of points and Tungatech will return a specified schedule.

Gas billing meters measure the volume drawn at each supply point and report it to the vending or billing system. Where gas is bought in bulk and consumed by multiple occupants, the meter is what converts an unrecoverable overhead into a recoverable charge, and it is what settles a dispute over what a tenant actually used.

Where it applies: restaurants, hotels and commercial kitchens · residential estates and flats on reticulated supply · industrial process gas · laundries and boiler houses · any bulk supply serving more than one paying occupant.

Safety. Work on a live gas installation is carried out under a written procedure covering isolation, purging, tightness testing and re-commissioning, by the trade qualified for that work. The proposal states the isolation required, the supply affected and the outage window, and the meter is put into service once the installation has passed a tightness test.

Model designations, flow ranges, connection sizes and prepayment standard are confirmed against the current VeryCo datasheet at enquiry stage. Send the gas type, the supply pressure and the flow range at each point and Tungatech will return a specified schedule.

A meter that nobody reads recovers nothing. Tungatech designs the submetering strategy, the communication path and the reporting layer at the same time as the meter schedule, so the consumption data arrives somewhere a person acts on it.

• Submetering strategy: which points are metered, at what level, and what question each meter answers
• Communication path selection against what the site carries, from RS485 through to cellular
• Integration into the building management system, SCADA or a reporting dashboard
• Vending and prepayment account setup, with operator training on issuing credit and handling disputes
• Consumption profiling, anomaly identification and tenant recovery reporting
• Reconciliation of submetered consumption against the incoming bulk supply, so unaccounted losses are visible

Reconciliation is the part most installations skip. The sum of the submeters should track the bulk meter within a known margin. Where it does not, the gap is either a metering fault or an unmetered connection, and both are worth finding.