Thermo Scientific AnalogPlus Analog Output Sensor

Overview

The Thermo Scientific AnalogPlus Analog Output Sensor is an industrial-grade, process-optimized analog transducer engineered for continuous, reliable measurement of critical water quality parameters—including temperature, pH, conductivity, dissolved oxygen, and ORP—in demanding online water quality monitoring systems. Built on a robust analog signal architecture (4–20 mA or 0–10 V output), the sensor delivers stable, low-noise transmission over extended cable runs without signal degradation—making it especially suitable for integration into SCADA-controlled wastewater treatment plants, drinking water distribution networks, industrial effluent streams, and environmental compliance monitoring stations. Its design adheres to fundamental principles of electrochemical and thermistor-based sensing, with signal conditioning circuitry calibrated to minimize drift under variable ambient temperature, pressure, and electrical noise conditions typical in municipal and industrial infrastructure environments.

Key Features

• Engineered for long-term deployment in harsh process environments—including high-turbidity, high-suspended-solids, and chemically aggressive water matrices.
• Fast thermal response time (t₉₀ < 30 s) enabled by low-mass thermistor elements and optimized thermal coupling geometry.
• Modular mechanical interface: Available with standard NPT thread sizes—¾”, 1.0″, and 1.5″—to ensure compatibility with existing pipe spools, sample chambers, and flow cells.
• Chemically resistant housing options: CPVC for cost-effective general-purpose use in neutral-to-mildly acidic/alkaline applications; PEEK for enhanced resistance to oxidizers, solvents, and elevated temperatures up to 120 °C.
• Field-configurable cable length options (1 m, 5 m, 10 m, and custom lengths up to 50 m) with shielded, twisted-pair construction meeting IEC 61000-4-5 surge immunity requirements.
• Compliant with NEMA 4X and IP68 ingress protection ratings when installed with appropriate gland fittings—ensuring operational integrity in outdoor, submerged, or washdown-prone locations.

Sample Compatibility & Compliance

The AnalogPlus sensor supports direct immersion or insertion-style installation across raw influent, clarified effluent, distribution loop, and groundwater abstraction points. It maintains accuracy and stability in samples with turbidity up to 4000 NTU, suspended solids concentrations ≤ 15 g/L, and salinity ranging from freshwater (< 0.5 ppt) to brackish water (≤ 15 ppt). All variants are designed and tested in accordance with ASTM D1129 (Standard Terminology Relating to Water), ISO 5814 (Dissolved Oxygen—Electrochemical Probe Method), and US EPA Method 180.1 (pH Measurement). Units shipped for regulated facilities include full traceable calibration documentation aligned with ISO/IEC 17025 requirements and support GLP/GMP audit readiness through optional factory calibration certificates with uncertainty budgets.

Software & Data Management

While the AnalogPlus sensor operates as a standalone analog transmitter, it is fully interoperable with Thermo Scientific Orion™ Series controllers, DeltaTRAK® data loggers, and third-party PLC/DCS platforms supporting HART-enabled analog input modules. When paired with compatible Thermo Fisher data acquisition hardware, the sensor contributes to audit-trail-compliant data streams compliant with FDA 21 CFR Part 11 (electronic records and signatures) via optional firmware-enabled timestamping and write-protected memory registers. Raw analog outputs can be mapped to engineering units using linear or polynomial scaling coefficients stored in host systems—enabling seamless integration into LIMS, PI System, or cloud-based environmental dashboards such as AWS IoT SiteWise or Azure IoT Central.

Applications

• Real-time temperature monitoring in activated sludge basins and anaerobic digesters for process control and energy optimization.
• pH and ORP feedback control in chemical dosing systems for coagulation, disinfection, and corrosion inhibition.
• Conductivity-based salinity tracking at intake points of desalination pretreatment trains.
• Dissolved oxygen profiling in aerobic bioreactors to maintain optimal DO setpoints per nitrification kinetics (e.g., following ISO 9087).
• Regulatory reporting compliance for NPDES permits, EU WFD (Water Framework Directive) status assessment, and China’s GB 3838–2002 surface water quality standards.

FAQ

Is the AnalogPlus sensor compatible with non-Thermo Fisher controllers?
Yes—its standard 4–20 mA or 0–10 V analog output conforms to IEC 60381-1 and is compatible with any industrial controller, PLC, or RTU accepting passive or active current/voltage inputs.
Does it support digital communication protocols such as Modbus or HART?
The base AnalogPlus model provides analog-only output; however, HART-enabled variants (AnalogPlus-HART) are available upon request for configuration, diagnostics, and multi-variable readout capabilities.
What is the recommended recalibration interval under continuous operation?
For applications governed by ISO 17025 or regulatory mandates, annual verification against traceable reference standards is advised; field verification frequency may be extended to 6 months based on historical performance trending and risk assessment per ISO/IEC 17043 proficiency testing guidelines.
Can the sensor be used in pressurized pipelines?
Yes—when installed with rated NPT fittings and appropriate pressure-rated housings, it operates reliably at static pressures up to 10 bar (145 psi) at 25 °C, with derating above 60 °C per material-specific pressure-temperature charts.
Are explosion-proof or intrinsically safe versions available?
ATEX-certified (II 2G Ex db IIB T4 Gb) and IECEx-compliant variants are offered for Zone 1 hazardous area installations, subject to system-level approval per IEC 60079-14.