Denver MXX Series Portable Electronic Balance

Overview

The Denver MXX Series Portable Electronic Balance is a precision weighing instrument engineered for field deployment, mobile laboratories, quality control checkpoints, and educational environments where space, power availability, and operational flexibility are constrained. Designed around electromagnetic force compensation (EMFC) transduction technology, the MXX series delivers high reproducibility and long-term stability without mechanical levers or knife-edges. Each unit features a robust, shock-absorbing housing and an optimized load-cell architecture that minimizes thermal drift and vibration sensitivity—critical for reliable measurements in non-climate-controlled settings. The balance operates on either AC power or internal rechargeable batteries, enabling uninterrupted use during transport or temporary site installations. Its compact footprint and lightweight construction (ranging from 1.2 kg to 3.8 kg depending on model) make it suitable for integration into mobile carts, glove boxes, or portable analytical workstations.

Key Features

• Electromagnetic force compensation (EMFC) sensor with auto-zero tracking and dynamic temperature compensation
• Backlit high-contrast LCD display with adjustable brightness for low-light or outdoor conditions
• Sealed membrane keypad rated for splash resistance—meets IEC 60529 IPX2 equivalent protection against vertical dripping water
• Stainless steel weighing pan (either Ø97 mm circular or 142 × 130 mm rectangular) designed for chemical resistance and easy decontamination
• Built-in calibration weight storage compartment (standard on models equipped with external calibration functionality)
• Intelligent power management: programmable auto-off timer and audible/visual low-battery warning during battery operation
• Eight integrated weighing modes: standard weighing, parts counting, percentage weighing, hold (display lock), formula summation, density determination (with optional density kit), unit conversion, and net/gross/tare toggling

Sample Compatibility & Compliance

The MXX series accommodates a broad range of sample types—from powders and granules to small components and liquid containers—within its specified capacity and readability ranges. All models comply with international metrological requirements per OIML R76-1 (2006) and NIST Handbook 44 for Class II and III weighing instruments. The stainless steel pan and sealed electronics support routine cleaning protocols aligned with ISO/IEC 17025 laboratory hygiene standards. While not certified for hazardous locations, the balance’s low-voltage DC operation and absence of internal combustion elements render it suitable for general-purpose use in GMP-compliant manufacturing zones, pharmaceutical QC labs, and academic teaching facilities. No model is intended for continuous use in explosive atmospheres or under sustained condensation.

Software & Data Management

Data output is supported via optional RS232 or USB interface, enabling direct communication with LIMS, ELN, or statistical process control (SPC) platforms. The balance transmits stable weight values with timestamped records when paired with compliant host software. Though the MXX series does not include onboard 21 CFR Part 11–compliant audit trail functionality, its deterministic serial output format (ASCII-based, configurable baud rate and delimiter) facilitates integration into validated systems where electronic records are governed by FDA, EMA, or MHRA regulatory frameworks. Users may configure data transmission intervals, units, and prefix/suffix identifiers to align with enterprise data ingestion logic.

Applications

• Field-based quality assurance in food processing plants, where rapid verification of ingredient batches is required
• Inventory management and component counting in electronics assembly lines
• Density determination of solids and liquids using Archimedes’ principle (with optional sinker kit)
• Teaching fundamental metrology concepts—including uncertainty estimation, repeatability assessment, and calibration traceability—in undergraduate chemistry and engineering labs
• On-site verification of packaging fill weights in contract manufacturing organizations (CMOs)
• Environmental sampling workflows requiring portable mass verification prior to lab submission

FAQ

Is the MXX series compliant with ISO/IEC 17025 requirements for accredited testing laboratories?
Yes—the design, factory calibration, and documentation package (including traceable calibration certificate per ISO/IEC 17025 Annex A.1) support implementation within accredited scopes, provided users perform periodic verification per their internal quality manual.
Can the balance be calibrated internally without external weights?
No internal motorized calibration mechanism is present; models designated for external calibration require user-provided Class M2 or better weights traceable to national standards.
What is the battery life under typical usage conditions?
With alkaline AA batteries, average runtime is 120 hours in standby and 40 hours under continuous weighing cycles; lithium-ion rechargeable pack extends this to approximately 200 hours standby.
Does the MXX series support GLP-compliant data export?
While the device itself lacks electronic signature or audit trail features, its ASCII-formatted serial output enables GLP-aligned data capture when integrated with validated third-party acquisition software.
Are replacement pans and calibration weights available as spare parts?
Yes—stainless steel pans (P/N MXX-PAN-97 and MXX-PAN-142), calibration weight sets (MXX-CAL-KIT-M2), and protective carrying cases (MXX-CASE) are stocked globally through authorized Denver distributors.