Thermo Fisher AnalogPlus™ Analog Conductivity Electrode
| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Manufacturer | Thermo Fisher Scientific |
| Product Type | Imported |
| Model | AnalogPlus Conductivity Electrode |
| Pricing | Available Upon Request |
Overview
The Thermo Fisher AnalogPlus™ Analog Conductivity Electrode is a precision-engineered, two-electrode conductivity sensor designed for continuous, real-time measurement of electrical conductivity and resistivity in liquid process streams and environmental water matrices. Operating on the principle of AC-driven two-electrode conductometry, it eliminates polarization effects and minimizes electrode fouling—critical for long-term stability in unattended online monitoring applications. Unlike digital or smart sensors with embedded microprocessors, the AnalogPlus™ delivers a robust 4–20 mA analog output signal directly proportional to conductivity (or resistivity), enabling seamless integration with legacy PLCs, DCS systems, and SCADA platforms without protocol translation or firmware dependencies. Its design prioritizes mechanical durability, chemical resistance, and metrological traceability—making it suitable for demanding applications in regulated industries including pharmaceutical water systems (PW, WFI, Purified Water), semiconductor ultrapure water (UPW), power plant condensate monitoring, and municipal/industrial wastewater treatment.
Key Features
- Coaxial dual-ring electrode architecture minimizes stray capacitance and electromagnetic interference, ensuring stable signal integrity in electrically noisy industrial environments.
- Configurable cell constants (K = 0.01 cm⁻¹, 0.1 cm⁻¹, and 1.0 cm⁻¹) enable accurate measurement across three distinct dynamic ranges: ultra-pure water (0.055–18.2 MΩ·cm), low-conductivity surface water (1–200 μS/cm), and higher-conductivity process streams (up to 2000 μS/cm).
- Titanium electrode bodies (ASTM B348 Grade 2) provide exceptional corrosion resistance in chlorinated, oxidizing, or saline media—ideal for seawater intake monitoring or cooling tower applications.
- PEEK (polyetheretherketone) housing option rated for continuous operation up to 120°C, supporting high-temperature RO permeate, distillation condensate, and steam condensate loop monitoring.
- CPVC (chlorinated polyvinyl chloride) variant offers cost-optimized performance for municipal drinking water distribution and non-aggressive industrial effluent streams, compliant with NSF/ANSI 61 for potable water contact.
- IP68-rated stainless steel process connection (¾″ NPT or DIN 16227) with integrated temperature sensor (Pt1000 RTD) for automatic conductivity compensation per ISO 7888 and ASTM D1125 standards.
Sample Compatibility & Compliance
The AnalogPlus™ electrode is validated for use in aqueous matrices with total dissolved solids (TDS) ranging from 1000 ppm (brackish influent). It maintains accuracy in turbid, low-silica, and low-organic-content waters where optical or capacitive sensors may drift. All materials in wetted contact—including titanium electrodes, PEEK insulators, and CPVC housings—are compliant with USP , EP 2.2.38, and ISO 14644-1 Class 5 cleanroom requirements when specified. The sensor meets CE marking directives (EMC 2014/30/EU, RoHS 2011/65/EU) and supports GLP/GMP data integrity workflows when paired with Thermo Fisher Orion Star™ A3000 or similar analog-input transmitters featuring audit-trail-enabled configuration logging.
Software & Data Management
As a purely analog device, the AnalogPlus™ requires no onboard firmware, driver installation, or cloud connectivity. Its 4–20 mA output is compatible with industry-standard analog input modules (e.g., Siemens SIMATIC S7-1200 AI, Emerson DeltaV HART I/O) and enables direct integration into existing LIMS or historian platforms via OPC UA or Modbus TCP gateways. When used with Thermo Fisher’s Orion Star™ series transmitters, users gain access to calibration history tracking, temperature-compensated conductivity calculation (linear or nonlinear α-coefficient models), and configurable alarm thresholds—all stored locally with timestamped event logs compliant with FDA 21 CFR Part 11 requirements for electronic records.
Applications
- Pharmaceutical purified water (PW) and water-for-injection (WFI) distribution loops per USP and EU GMP Annex 1.
- RO and EDI system performance monitoring in biotech manufacturing and semiconductor UPW plants.
- Steam condensate purity verification in thermal power generation and district heating networks.
- Real-time salinity tracking in coastal aquaculture, desalination pre-treatment, and ballast water management systems.
- Regulatory compliance monitoring for EPA NPDES permits and ISO 14001 environmental management systems.
FAQ
Is the AnalogPlus™ electrode compatible with third-party transmitters?
Yes—it outputs a standard 4–20 mA signal with HART protocol optional, supporting interoperability with any analog-input transmitter meeting IEC 61000-4-5 surge immunity and NAMUR NE43 fault signaling specifications.
What calibration frequency is recommended for GMP environments?
Per USP , daily system suitability checks are required; full two-point calibration (low- and high-range standards) should be performed at least weekly or after maintenance, documented with certified reference materials traceable to NIST SRM 3198 and SRM 3199.
Can the electrode be cleaned in situ without removal?
Yes—titanium and PEEK variants tolerate periodic acid washes (0.1 M HCl) or enzymatic cleaning solutions; CPVC models require neutral pH cleaning agents only to prevent polymer degradation.
Does the electrode support temperature compensation?
Yes—the integrated Pt1000 RTD provides simultaneous temperature measurement, enabling automatic linear or non-linear (α = 0.021 °C⁻¹) compensation per ISO 7888:2019.
