Lovibond MD200 Portable Photometer
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | MD200 |
| Pricing | Upon Request |
Overview
The Lovibond MD200 Portable Photometer is a field-deployable, high-precision photometric analyzer engineered for rapid, reliable quantitative determination of water quality parameters—including but not limited to nitrate, phosphate, iron, chlorine, hardness, and heavy metals—using colorimetric chemistry. Based on fixed-wavelength absorbance measurement (typically 450–610 nm), the instrument employs high-stability LED light sources coupled with precision interference filters to deliver consistent spectral selectivity without mechanical wavelength scanning. Unlike scanning spectrophotometers, the MD200 operates on a dedicated photometric principle optimized for routine environmental and process water testing: each test method is pre-configured with a defined optical pathlength (10 mm cuvette or integrated flow cell), calibrated wavelength, and corresponding calibration curve stored in non-volatile memory. Its solid-state architecture—featuring no moving parts, sealed optical train, and monolithic housing—ensures long-term stability under variable ambient conditions, making it suitable for both laboratory benchtop use and unattended field deployment.
Key Features
- IP68-rated enclosure for full submersion resistance (up to 2 m for 30 min), enabling operation in wet, dusty, or outdoor environments without protective casing.
- Integrated real-time clock with date/time stamping on all stored measurements—critical for GLP-compliant data traceability.
- Auto-power-off function with configurable timeout (1–30 min) to conserve battery life; retains all settings and calibration states across power cycles.
- Backlit LCD display with high-contrast alphanumeric interface, readable under low-light or direct sunlight conditions.
- Zero-point retention (OTZ): Once zeroed, the baseline offset remains active until powered off—eliminating repeated zeroing between sequential measurements of the same parameter.
- Smart Memory (SM): Automatically recalls the last-used test method upon startup, reducing operational latency during high-throughput field surveys.
- Self-contained calibration capability: Supports single-point user calibration using certified reference standards or factory calibration verification via Lovibond Calibration Solutions.
Sample Compatibility & Compliance
The MD200 accepts both liquid reagents and proprietary Lovibond tablet reagents—each tablet formulated for specific analytes and validated per ISO 7027 (turbidity), ISO 6777 (phosphate), and ASTM D1253 (residual chlorine). Tablet shelf life exceeds 5 years when stored at ≤25 °C and <60% RH, minimizing reagent logistics overhead. The instrument complies with IEC 61000-4 electromagnetic immunity standards and meets CE marking requirements for portable measuring instruments. Its measurement protocols align with EPA-approved methods for drinking water (e.g., Method 365.3 for phosphate) and wastewater monitoring (e.g., Method 4500-Cl G for free chlorine), supporting audit-ready documentation for ISO/IEC 17025-accredited laboratories.
Software & Data Management
Data export is supported via USB-C interface to PC-based Lovibond LabStation software (v5.2+), enabling batch download, statistical analysis (mean, SD, CV%), report generation (PDF/CSV), and electronic signature workflows compliant with FDA 21 CFR Part 11. All measurement events—including operator ID, timestamp, method ID, raw absorbance, calculated concentration, and calibration status—are logged with immutable audit trail metadata. Firmware updates are delivered through signed binary packages to ensure integrity and version control across fleet deployments.
Applications
- Drinking water treatment: On-site verification of disinfectant residuals (free/total chlorine, chloramine), turbidity, and metal contaminants (Cu, Pb, Mn).
- Wastewater effluent monitoring: Rapid assessment of nutrient loads (NO₃⁻-N, PO₄³⁻-P) prior to discharge compliance reporting.
- Aquaculture and hydroponics: Routine tracking of nitrite, ammonia, and alkalinity to maintain optimal growth conditions.
- Swimming pool & spa maintenance: Daily verification of sanitizer levels and cyanuric acid stability.
- Educational laboratories: Teaching quantitative analytical techniques with minimal training overhead and robust error prevention logic.
FAQ
Does the MD200 require annual recalibration by an accredited service provider?
No—routine user verification using Lovibond Certified Reference Standards satisfies ISO/IEC 17025 traceability requirements. Full factory recalibration is recommended every 24 months or after physical impact.
Can the MD200 be used with third-party reagents?
Only Lovibond-validated reagents (liquid or tablet) guarantee metrological equivalence to published method performance specifications. Non-OEM reagents may introduce bias due to spectral mismatch or matrix interference.
Is the instrument compatible with LIMS integration?
Yes—via LabStation software’s ODBC-compliant database export or direct API access (RESTful JSON over HTTPS) for automated ingestion into enterprise LIMS platforms.
What battery life can be expected during continuous field use?
With alkaline AA batteries, typical operation yields ≥10,000 measurements per set under standard ambient conditions (20–25 °C); lithium AA batteries extend this to ≥15,000 measurements and improve low-temperature performance.
How is measurement uncertainty quantified for each test method?
Expanded uncertainty (k=2) is stated in the instrument’s Certificate of Conformance and ranges from ±2.5% to ±5.0% of reading depending on analyte concentration range and method-specific validation data per ISO/IEC 17025 Annex A.3.
