- 2-wire compact microwave level transmitter
- rod, cable, or coaxial probe
- segmented rod probe version
- graphic display
- 4-20 mA + HART output + relay (optional)
- high pressure, high temperature range
- highest process pressure: 40 bar (580 psi)
- IP67 protection
- media with turbulent surface, dense dust, vapor, or pressurized gas layers above the product surface
MicroTREK Microwave Level Transmitter
The MicroTREK microwave level gauge from Nivelco operates based on measuring the travel time of impulse reflections (TDR – Time Domain Reflectometry). This level transmitter generates microwave impulses in the sensor, which travel at the speed of light. Part of the impulse energy is reflected from the surface depending on the material. The reflected signal’s travel time is measured and processed by the module’s electronics, and then it is converted to a volume-proportional level-proportional signal. Reflections depend heavily on the medium’s dielectric constant (εr), which must be at least 1.4 for successful measurement. The propagation speed of microwave impulses in a vacuum, air, and other gases is virtually the same. Distance measurement is therefore independent of the medium within the given limits.
- extremely small deadband
- advanced threshold management
- false echo suppression
- probe correction table (SCT)
- lowest εr ≥ 1.4
Specifications
| Supply Voltage | 12 to 36 V DC |
|---|---|
| Ambient Temperature | −22 to 140 °F |
| Process Temperature | −22 to 392 °F |
| Process Pressure | up to 580 psig |
| Measuring Range | 0 to 100 ft |
| Output | 4 to 20 mA + HART |
| Ingress Protection | IP67 |
| Approvals | ATEX, IEC Ex, INMETRO, UKCA Ex |
Dielectric Constant Values (εr)
| Butane | 1.4 | Grain | 3-5 |
| Cement | 1.5-10 | Cooking Oil | 3.9 |
| LPG | 1.6-1.9 | Limestone | 6.1-9.1 |
| Kerosene | 1.8-2.1 | Acetone | 21 |
| Crude Oil | 2.1 | Ethanol | 24 |
| Diesel | 2.1 | Methanol | 33.1 |
| Gasoline | 2.3 | Glycol | 37 |
| Asphalt | 2.6 | Nitrobenzene | 40 |
| Clinker | 2.7 | Water | 80 |
| Resin | 2.4-3.6 | Sulfuric Acid (T=68贔 [20贑]) | 84 |
Certifications
- ATEX: Ex ia G, Ex ia D, Ex ta/tb D
- IEC Ex: Ex ia G, Ex ia D
- INMETRO: Ex ia G, Ex ia D
- UKCA Ex: Ex ia G, Ex ia D, Ex ta/tb D
PiloTREK Microwave Level Measurement Model Line Up
MicroTREK with Cable Probe
MicroTREK with Coaxial Probe
MicroTREK with Rod Probe
Common uses of PiloTREK Microwave Level Transmitter
- level, distance, or volume measurement of liquids, powders, and granules with εr > 1.4
- agriculture
- construction materials
- chemical industry
- food and beverage production
- power plants
- oil and energy sector
- revenue water and wastewater industry
Mono Cable, Mono Rod, or Mono Segmented Rod
- cement, limestone, fly ash, alumina, soot
- all high viscosity liquids
- mineral powders
- clean and contaminated liquids
- stilling wells (calibration required)
- plastic coated probe for aggressive substances
- slightly conductive foams
- high temperature applications
- bypass applications
Twin Cable
- tank parks with solvents, oil, and fuels
- water storage tanks
- plastic granules
- products with low dielectric constant (εr > 1.8)
- any liquids or light granules
- narrow tanks
- where minimal dead zone is needed
- mounting close to tank wall is possible
Twin Rod
- plastic granules
- coated tanks
- clean and contaminated liquids
- fine powders
- where minimum dead zone is needed
- narrow tanks
- mediums with low dielectric constant and slightly moving products
Coaxial Pipe
- small vessels and tanks up to 20 ft (6 meters) tall
- solvents or liquefied gases
- liquefied petroleum gas (LPG) or liquefied natural gas (LNG)
- clean liquids with low dielectric constant
- agitated or flowing liquids – the probe acts as a stilling well
- liquid or vapor spray near the probe
- can be heated
- contact possible with metallic object or tank wall
- where no dead zone is allowed
