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NIVOPRESS N Hydrostatic Level Transmitter
Brand: Nivelco Process Control Co.
The NIVOPRESS N hydrostatic borehole level transmitters are designed to measure the level of clean or contaminated liquids.
The pressure sensor at the bottom of the probe measures the hydrostatic pressure (Pʜʏᴅʀ) of the liquid column above it and compares with the atmospheric pressure (Pᴀᴛᴍ).
The atmospheric pressure is led to the sensor through a breathing capillary which is equipped with a moisture filter that prevents the moisture reaching the electronics and decreasing the accuracy of the measurement.
This enables the atmospheric pressure to be subtracted from the measured pressure to get the hydrostatic pressure which is proportional to the height of the liquid column (h).
The electronics converts the sensor’s signal into an output signal. If temperature measurement (of the liquid) is needed beside the level measurement a combined (level plus temperature) transmitter should be used.
Features- Overvoltage and inverse polarity protection
- 2- or 3-wire versions
- Available with capacitance ceramic, piezorezistive stainless steel or ceramic sensor
- Built-in Pt100 temperature sensor
- Ex version
Specifications
Accuracy
- Temperature Transmitter NPD, NZD Typicals: ± 3° C (± 5.4° F)
Approvals & Certifications
- ATEX - Ex II 1 G Ex ia IIC T6
- CE 1418
BSP Connection
- 3/4” BSP Male
Cable Length
- 0 to 985 feet (0 to 300 metres)
Cable Type
- Shielded Cable with Breathing Capillary
Class
- Electrical Protection: Class III
Communication
- RS-485
Electrical Connectors
- 0.34 mm² (AWG22), Diameter 0.27” (7 mm)
Electrical Protection
- Overvoltage
- Polarity
Enclosure Finish
- Cable: FEP
- Cable: Polyurethane Coating (PUR)
Enclosure, Body Material
- 316Ti Stainless Steel, 1.4542 - NK, NN/ND, NH, NC, NT, NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
- Plastic - NB, NG Model
- POM - NB, NG Model
- Stainless Steel - NK, NN/ND, NH, NC, NT, NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
Environmental Protection
- IP68
Linearity
- Error (Level): ± 0.25 % - NC, NT, NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
- Error (Level): ± 0.45 % - NB, NG, NK, NN/ND, NH Model
Load Resistance
- ≥ 5 kiloohms, Max.
Measuring Range
- Water Head: 0 to 65 feet (0 to 20 metres) - NB, NG, NK, NN/ND, NH, NC, NT Model
- Water Head: 0 to 656 feet (0 to 200 metres) - NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
Operating Temperature
- -10° to 60° C (14° to 140° F) - NP/NZ 500 Typicals
Output
- 0-10 V (0 V ≤ 80 mV) Measured to the Power Supply - NPH, NFH/NZH, NRH Model
- 4-20 mA - NB, NG, NK, NN/ND, NH, NC, NT, NP, NF/NZ, NR Model
Power Supply
- 12-30 Vdc - NB, NG, NK, NN/ND, NH, NC, NT, NP, NF/NZ, NR Model
- 18-30 Vdc/6 mA - NPH, NFH/NZH, NRH Model
- Temperature Transmitter NPD, NZD Typicals: 14-30 Vdc/4-20 mA
Process Temperature
- -30° to 60° C (-22° to 140° F)
RTD Type
- Pt100
Seat / Seal Material
- Seal: FKM
- Seal: Viton
Sensor, Probe Material
- Sensor: 316L Stainless Steel, 1.4401 - NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
- Sensor: Aluminum Oxide - NB, NG, NK, NN/ND, NH, NC, NT Model
- Sensor: Ceramic - NB, NG, NK, NN/ND, NH, NC, NT Model
- Sensor: Stainless Steel - NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
Temperature Effect
- ≤ ± 0.1 %/10 K - NB, NG, NK, NN/ND, NH, NC, NT, NP, NF/NZ, NR Model
- ≤ ± 0.2 %/10 K - NPH, NFH/NZH, NRH Model
Temperature Range
- Temperature Transmitter NPD, NZD Typicals: 0° to 60° C (32° to 140° F)
Wetted Materials
- Protecting Cap: 316Ti Stainless Steel, 1.4542 - NK, NN/ND, NH, NP, NF/NZ, NR, NPH, NFH/NZH, NRH Model
- Protecting Cap: POM - NB, NG Model
- Clean or Slightly Contaminated Liquids
- Draw Down Protection
- Level & Temperature Measurement of Drinking Water Wells, Tanks, Pools
- Saline Solutions, Seawater
- Sewage Lift Station Control
- Submersible Pump Control
- Sewage & Wastewater