GreenPrima PROLEV200 Ultrasonic Level Meter

Overview

The GreenPrima PROLEV V200 is a high-performance, microprocessor-based ultrasonic level meter engineered for reliable non-contact level measurement in demanding water and wastewater infrastructure environments. Operating on the principle of time-of-flight ultrasonic pulse echo, the device emits high-frequency sound waves (typically 50 kHz) toward the surface of the medium and precisely calculates distance based on the elapsed time between emission and return echo detection. This physics-based methodology ensures immunity to changes in medium density, conductivity, transparency, or dielectric constant—making it especially suitable for turbid, aerated, or chemically aggressive liquids commonly encountered in municipal water supply systems, reservoirs, wet wells, and clearwells. Its robust digital signal processing architecture incorporates real-time temperature compensation and adaptive gain control to maintain consistent performance across ambient fluctuations and variable surface conditions—including foam, vapour layers, or low-reflectivity surfaces.

Key Features

• Integrated microprocessor with advanced echo recognition algorithms for stable operation under dynamic process conditions
• Automatic power adjustment and dynamic gain control to optimize signal-to-noise ratio across varying tank geometries and fill levels
• Onboard temperature compensation using integrated Pt1000 sensor, correcting for speed-of-sound variations in air
• Intelligent false echo suppression to filter out interference from tank structures, agitators, ladders, or inlet streams
• Corrosion-resistant transducer housing options: ETFE or PVDF—certified for prolonged exposure to chlorine, sodium hypochlorite, and other common disinfectants used in potable water treatment
• IP67-rated polycarbonate/polypropylene enclosure, resistant to UV degradation, condensation, and mechanical impact in outdoor or unheated enclosures
• Configurable via local keypad or optional PC configuration software—no external programming hardware required

Sample Compatibility & Compliance

The PROLEV V200 is validated for continuous level monitoring of potable water, clarified effluent, raw intake water, sludge supernatant, and granular media (e.g., sand or gravel in filter beds). It complies with EN 61326-1 (EMC for industrial environments), EN 61000-6-2/-4 (immunity and emissions), and meets CE marking requirements for use within the European Economic Area. While not intrinsically safe certified, its non-sparking design and absence of internal energy storage make it appropriate for Zone 2 classified areas per IEC 60079-0. The instrument supports routine calibration verification per ISO 5725 (accuracy and precision) and aligns with operational requirements outlined in UK Water Industry Specification WIS 4-02-02 for ultrasonic level instrumentation in drinking water assets.

Software & Data Management

Configuration and diagnostics are performed via an intuitive three-button interface with backlit LCD display showing real-time level, status flags, and diagnostic codes (e.g., “No Echo”, “Signal Weak”, “Temperature Out of Range”). Optional GreenPrima ConfigTool software enables remote parameterization—including damping time, fail-safe output mode (high/low/current loop break), and custom linearisation tables for irregular tank profiles—via USB-to-RS485 adapter. All configuration changes are timestamped and stored in non-volatile memory. While the V200 does not support full audit trail functionality per FDA 21 CFR Part 11, its deterministic firmware behaviour and immutable factory calibration constants ensure traceability during GLP-aligned maintenance logs.

Applications

Primary deployment contexts include raw water intake basins, sedimentation tank level supervision, clearwell inventory control, pump sump monitoring, chemical dosing tank management, and filter backwash water level feedback. The device is also deployed in flood warning networks and irrigation canal gauging stations where long-term stability and minimal maintenance are critical. Its compatibility with both liquid and coarse solid media extends utility to grit chamber level sensing and dry well inventory in pump station infrastructure.

FAQ

What is the minimum measurable distance (blind zone) for the PROLEV V200?

The blind zone is 0.25 m for the 6 m range version and 0.5 m for the 10 m version—defined as the near-field region where acoustic ringing prevents reliable echo detection.
Can the PROLEV V200 be used in pressurised vessels?

No—it is rated for maximum static overpressure of 1.5 bar and must be installed in vented or atmospheric tanks only.
Is temperature compensation automatic or user-configurable?

Fully automatic; the integrated Pt1000 sensor continuously measures ambient air temperature and adjusts sound velocity calculations in real time.
Does the device support HART communication?

No—the V200 provides analog 4–20 mA output only; for digital protocol support, consider the PROLEV V300 series with Modbus RTU.
How often does the unit require recalibration?

Under normal operating conditions in water treatment applications, field recalibration is not required; periodic verification against a reference tape measure or laser distance meter every 12–24 months is recommended per WIS 4-02-02 guidelines.