The MicroTREK HT-700 guided microwave level transmitter is designed for the continuous level measurement of conductive and non-conductive liquids, pulps, and solids. The measuring speed of the MicroTREK from Nivelco is almost ten times that of its predecessor, its measuring dead zone is significantly smaller, and its maximum measuring distance is longer! Furthermore, the power supply range of the device has been expanded.
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.
| 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 |
| 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˚F [20˚C]) | 84 |
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