Monitek Turbidimeter

Overview

The Monitek Turbidimeter by Galvanic is an industrial-grade online turbidity analyzer engineered for continuous, real-time monitoring of suspended solids in liquid process streams. It operates on the standardized 12° forward scatter optical principle—defined in ISO 7027 and aligned with EPA Method 180.1—where a collimated light beam (wavelength range 390–900 nm) is directed perpendicularly through the sample, and scattered light intensity at precisely 12° from the incident axis is measured by a photodetector integrated within the sensor head. Simultaneously, the transmitted light is captured by a reference detector to compensate for lamp aging, window fouling, and absorbance effects. This dual-signal architecture ensures stable, drift-resistant measurements across variable color, absorption, and particle morphology conditions—critical in demanding applications such as wastewater effluent control, potable water distribution, and hygienic food & beverage processing.

Key Features

• True forward-scatter optical design compliant with ISO 7027 and US EPA 180.1 for traceable, regulatory-grade turbidity reporting
• Robust in-line probe construction with 316L stainless steel housing; optional titanium or Mn-Co alloy for aggressive chemical environments
• Sapphire optical window—scratch-, corrosion-, and thermal-shock resistant—rated for continuous operation up to 140 °C and PN16/ANSI 150 pressure classes
• CIP-compatible probe geometry with optional integrated cleaning nozzles for automated maintenance in sanitary processes
• ATEX-certified variants available for Zone 1 and Zone 2 hazardous areas, meeting IEC 60079-0 and IEC 60079-11 requirements
• Configurable analog outputs (up to four isolated 4–20 mA channels), digital Modbus RTU interface (RS-485), and four programmable relays for alarm, control, or interlock functions
• Wide ambient operating range (−10 °C to +50 °C) and IP65/NEMA 4X-rated electronics enclosure for harsh plant-floor deployment

Sample Compatibility & Compliance

The Monitek Turbidimeter is validated for use with aqueous and low-viscosity non-corrosive to moderately corrosive process fluids—including municipal and industrial wastewater, clarified drinking water, beer wort, dairy streams, pharmaceutical rinse water, and chemical process liquors. Its broad measurement range (0–8000 mg/L as SiO₂ equivalent, extendable to 0–50,000 Hazen units depending on optical path configuration) supports both low-turbidity compliance monitoring (e.g., <0.3 NTU for finished water per WHO and US EPA standards) and high-load slurry surveillance. All configurations meet GLP and GMP data integrity expectations when paired with compliant SCADA or DCS systems; optional audit-trail logging and user-access controls align with FDA 21 CFR Part 11 requirements where electronic records are maintained.

Software & Data Management

The instrument supports native integration into distributed control systems via Modbus RTU protocol over RS-485, enabling seamless acquisition of turbidity values, diagnostic status, temperature compensation data, and relay state information. Local configuration and diagnostics are accessible via RS-232C terminal interface using ASCII command set. No proprietary software is required for basic operation; however, Galvanic provides optional engineering configuration utilities for advanced calibration mapping, multi-point validation, and trend logging. All analog and digital outputs support linear or user-defined scaling, and relay logic can be programmed for hysteresis-based alarms, pump start/stop sequencing, or auto-initiation of CIP cycles based on turbidity deviation thresholds.

Applications

• Real-time turbidity monitoring in drinking water treatment plants—especially post-filtration and pre-distribution points
• Effluent compliance verification in municipal and industrial wastewater treatment facilities (per ISO 10523 and EN 872)
• In-line quality assurance in breweries (wort clarity, filtration breakthrough detection), dairies (pasteurized milk homogeneity), and soft drink bottling lines
• Monitoring of chemical precipitation reactors, clarifier underflow, and sludge dewatering feed streams
• Pharmaceutical clean-in-place (CIP) validation and rinse water clarity verification per USP particulate matter guidelines
• Process optimization in mineral processing, pulp & paper white water circuits, and electroplating rinse tanks

FAQ

What turbidity units does the Monitek Turbidimeter report in?
The instrument outputs turbidity in NTU (Nephelometric Turbidity Units) by default, calibrated against formazin standards. Optional firmware configurations support FNU (Formazin Nephelometric Units) and EBC (European Brewery Convention) units for beverage-specific applications.
Can the sensor be installed in pressurized pipelines without process interruption?
Yes—the probe features standard flanged or tri-clamp mounting options (DN25–DN125 / ½″–5″) and is rated for continuous service at PN16 / ANSI Class 150. Hot-tap installation kits are available upon request.
How often does the instrument require calibration or maintenance?
Under stable conditions, annual verification against certified formazin standards is recommended. The sapphire window and dual-detector architecture minimize drift; routine visual inspection and periodic cleaning (manual or CIP-assisted) are sufficient for most applications.
Is the device compatible with explosion-proof enclosures for Zone 1 classified areas?
Yes—ATEX-certified versions (II 2G Ex db IIB T4 Gb or II 2D Ex tb IIIC T135°C Db) are available with intrinsically safe or flameproof housings per IEC 60079 series.
Does the turbidimeter support temperature compensation?
Yes—integrated Pt100 RTD measures process fluid temperature in real time and applies ISO 7027-compliant compensation algorithms to correct for refractive index variation across the −10 °C to +140 °C operational range.