Merck Spectroquant® Move Handheld Photometer

Overview

The Merck Spectroquant® Move Handheld Photometer is a rugged, field-deployable optical analyzer engineered for rapid, on-site quantification of residual chlorine and chlorine dioxide in drinking water, wastewater, swimming pools, and industrial process streams. It operates on the principle of fixed-wavelength absorption photometry: a stable 530 nm LED light source illuminates the sample within a transparent 10-mm pathlength cuvette chamber; transmitted light is measured by a calibrated photodiode sensor, and absorbance is calculated per the Beer–Lambert law. The instrument integrates pre-programmed, method-validated calibration curves for over 50 water quality parameters—including free chlorine, total chlorine, chlorine dioxide, nitrate, phosphate, and hardness—enabling reliable multi-parameter analysis without manual curve generation. Its compact form factor, IP68-rated enclosure, and battery-powered operation make it suitable for routine field use under variable environmental conditions, including humid or splash-prone settings.

Key Features

• Fixed-wavelength photometric architecture centered at 530 nm, optimized for DPD-based chlorine and chlorine dioxide assays with high spectral specificity and minimal interferences;
• Chemical-resistant keypad membrane rated for exposure to acids, oxidants, and organic solvents commonly encountered in water sampling environments;
• IP68 ingress protection ensures full dust-tightness and submersion capability up to 1.5 m for 30 minutes—validated for operational reliability in rain, fog, or wet laboratory benches;
• Integrated 16-result memory with timestamping, supporting GLP-compliant traceability for field audits and internal quality control;
• Low-power design: 4 AAA alkaline cells provide ≥5,000 measurements or 17 hours of continuous operation—no external charger or USB dependency required;
• Preloaded, factory-validated test methods aligned with ISO 7393-2 (chlorine), ISO 10629 (chlorine dioxide), and EPA Method 334.0, reducing operator-dependent variability.

Sample Compatibility & Compliance

The Spectroquant® Move accepts standard 10-mm square glass or plastic cuvettes (including Merck’s disposable cuvettes, e.g., 114550 or 114551). It supports both liquid-phase colorimetric reagents (e.g., DPD, ABTS, or LGB-based kits) and solid reagent tablets. All built-in methods are validated per ISO/IEC 17025 requirements for analytical competence and comply with relevant regulatory frameworks including EU Drinking Water Directive (2020/2184), US EPA Safe Drinking Water Act monitoring guidelines, and WHO Guidelines for Drinking-water Quality. While the device itself does not generate electronic audit trails required for 21 CFR Part 11 compliance, its optional infrared data transfer module enables secure export of raw absorbance values and metadata to Spectroquant® LabStation software for subsequent validation, reporting, and archiving in regulated environments.

Software & Data Management

Data acquisition and reporting are supported via the optional Spectroquant® IR Adapter and Spectroquant® LabStation PC software (v5.0+). This platform enables batch export of measurement logs—including date/time stamps, operator ID, method name, absorbance values, concentration results, and cuvette ID—to CSV or PDF formats. LabStation supports user-defined report templates, calibration verification logs, and method version tracking. For laboratories operating under GLP or GMP, the software facilitates assignment of user roles, password-protected method editing, and export of audit-ready records compliant with ISO 17025 Clause 7.7 (result reporting) and ISO 9001 Clause 8.5.2 (traceability).

Applications

• Routine disinfectant residual monitoring at water treatment plant effluent points and distribution system hydrants;
• Swimming pool and spa facility compliance checks per EN 15288-1 and NSF/ANSI 50 standards;
• Emergency response field screening during contamination events or post-disinfection verification;
• Industrial cooling tower and boiler feedwater management per ASTM D1293 and D511;
• Educational laboratories requiring robust, low-maintenance photometric instrumentation for undergraduate water chemistry modules;
• Third-party environmental testing services performing accredited on-site analyses under ISO/IEC 17025 scope.

FAQ

Does the Spectroquant® Move support custom calibration curves?
No—the instrument only executes pre-installed, factory-validated methods. Custom curve loading or wavelength adjustment is not supported to maintain metrological integrity and regulatory alignment.

Is the device compatible with non-Merck reagents?
While chemically feasible, use of third-party reagents voids method validation and may compromise accuracy, repeatability, and regulatory acceptability. Merck recommends Spectroquant® test kits (e.g., 114555 for chlorine dioxide) for full traceability.

How is wavelength accuracy verified during routine use?
Wavelength stability is ensured by factory calibration using NIST-traceable interference filters; no user recalibration is required. Annual verification against a certified reference filter (e.g., Merck 114560) is recommended for ISO 17025-compliant labs.

Can the IR adapter be used with mobile devices?
No—the Spectroquant® IR interface is designed exclusively for Windows-based PCs running LabStation software. Bluetooth or smartphone connectivity is not supported.