MicroTREK – Guided Microwave Level Transmitters

Brand: Nivelco

2-wire Compact TDR Level Transmitter for liquids and free-flowing solids with stainless steel mono or twin rod probe with or without plastic coating.

Available on request

Please contact us for pricing.

All prices are in NZ$, and GST exclusive and are subject to change without notice.

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Product Details

MicroTREK Features

2-wire compact transmitter
±5 mm accuracy
High pressure
High-temperature range
Wide range of probes
Extremely small deadband
Rod, cable, or coaxial probe versions
Plug-in graphic display module
Explosion-proof variants
Plastic, aluminum or stainless steel housing
Up to 30 m measuring range
Tracking speed: 900 m/h (= 25 cm/s)
Advanced threshold management
False echo exclusion
Probe Correction Table (SCT)
Interface measurement

The MicroTREK Guided Wave Radar level transmitter is designed for continuous level measuring of conductive or non-conductive liquids, pulps and solids. MicroTREK level gauge operates based on the well-known TDR (Time Domain Reflectometry) principle.

Micropulses are sent along a probe guide at the speed of light. As soon as the impulse reaches the surface of the medium, it is reflected back to the electronic module. Level distance is directly proportional to the flight time of the impulse.

The reflected signal is dependent on the dielectric constant of the material, the feasibility of the measurement is ε_r > 1.4.

The TDR technology is unaffected by the properties of the medium as well as that of the space above it. Measurement is also unaffected by the change in the physical properties of the materials such as temperature, pressure, dielectric constant.

Technical Specs


MicroTREK Specifications
Measured values	Distance, level; calculated values: volume, mass
Measuring range	Depends on the probe type and dielectric constant (εr) of the measured medium
Probe types	Mono cable, twin cable, mono rod, twin rod, coaxial pipe and segmented rod
Accuracy	Linearity error(1)	For liquids: ±5 mm, if probe length ≥ 10 m: ±0.05% of the probe length For solids: ±20 mm, if probe length ≥ 10m: ±0.2% of the probe length

	Resolution	±3 μA
Minimum εr of the medium	1.4 (depending on the probe type)
Power supply	18 – 35 V DC, nominal 24 V DC, Ex version: 18 – 28 V DC, protection against surge transients
Output	Digital communication	4 – 20 mA + HART®
	Display	SAP-300 graphical display unit
Ambient temperature	-30 °C ~ 60 °C, with display: -20°C ~ 60°C
Medium temperature	-30 °C … +90 °C		High Temp Version -30 °C … +200 °C
	With plastic coated probes see: Technical data of the coated probes
Max medium pressure	4 MPa (40 bar); with plastic lined flange: max. 2.5 MPa (25 bar); with coaxial pipe probe: max. 1.6 MPa (16 bar)
Process connection	Threaded, Flanged or Sanitary connections (as per order codes)
Ingress protection	IP67
Electrical connection	2x M20x1.5 cable glands + internal thread for 2x ½" NPT cable protective pipe, cable outer diameter: Ø7 – Ø 13 mm, wire cross section: max. 1.5 mm2
Electrical protection	Class III
Housing material	Plastic (PBT) or Paint coated Aluminium
Sealing	FPM (Viton®), optional: FFKM (Kalrez®), EPDM
(1) Under reference conditions and stabilized temperature
Available in Plastic housing, Metal housing or Stainless steel housing.