A&D SJ-3000WP Waterproof Benchtop Scale

Overview

The A&D SJ-3000WP is a high-integrity, IP67-rated waterproof benchtop scale engineered for demanding industrial, pharmaceutical, and food processing environments where hygiene, repeatability, and operational resilience are non-negotiable. Built upon A&D’s proprietary electromagnetic force compensation (EMFC) sensor architecture—optimized for moisture resistance—the SJ-3000WP delivers stable, drift-free readings under continuous wet-condition operation. Its full-unit submersibility (per IEC 60529) enables complete washdown with pressurized water or chemical disinfectants without disassembly, eliminating microbial harborage points common in conventional load-cell designs. The scale operates on six standard AA cells, supporting up to 5,000 hours of battery life when display backlighting and screen illumination are disabled—a critical advantage in remote or mobile QC stations where AC power is unavailable or impractical.

Key Features

• IP67-certified enclosure: Fully sealed against dust ingress and capable of 30-minute immersion in 1 m of water (tested per ISO 20653); suitable for USDA-FSIS and EHEDG-compliant sanitation protocols.
• High-speed stabilization: Achieves reading stability in ≤0.5 seconds across full capacity, enabled by adaptive digital filtering and low-noise EMFC transduction.
• SUS304 stainless steel weighing pan (232 × 192 mm): Electropolished surface finish minimizes residue adhesion and resists pitting from acidic or saline samples.
• Large-format backlit LCD (26 mm digit height): Optimized for gloved operation and low-ambient lighting; white LED backlight ensures legibility in high-glare or refrigerated environments.
• Five-color status indicator: Provides immediate visual feedback for underweight, nominal, overweight, overcapacity, and error states—reducing operator interpretation time and misreading risk.
• Touch-sensitive membrane keypad: Sealed interface eliminates crevices for bacterial colonization; calibrated to reject false actuation from moisture or incidental contact.
• Modular sensor suspension: Load cell is mechanically isolated within the pan support frame, decoupling mechanical stress from the transducer and enhancing long-term calibration stability.
• Comprehensive unit support: Native conversion among 9 units (g, kg, lb, oz, ozt, lb-oz, tael, tola, Newton), configurable via front-panel menu without software dependency.

Sample Compatibility & Compliance

The SJ-3000WP accommodates heterogeneous sample forms—including viscous liquids, particulates, packaged goods, and temperature-sensitive biologicals—without performance degradation. Its sealed construction prevents corrosion from chloride-rich food brines, ethanol-based sanitizers, or aqueous pharmaceutical solutions. The scale complies with OIML R76-1 (2021) for non-automatic weighing instruments and meets the mechanical robustness requirements of ISO/IEC 17025:2017 Annex A.2 for laboratory balance validation. While not certified for hazardous locations (e.g., ATEX/IECEx), its design supports integration into GLP/GMP workflows requiring documented calibration traceability (NIST-traceable weights recommended) and audit-ready functionality such as automatic log timestamping for tare events and weight recordings.

Software & Data Management

The SJ-3000WP operates autonomously without host software but supports bidirectional RS-232 and optional USB-to-serial connectivity for integration with LIMS, MES, or ERP platforms. All communication adheres to standard ASCII protocol (A&D’s proprietary “Scale Command Set”), enabling seamless parsing of weight data, unit codes, and status flags. Internal event logging records tare actions, unit changes, and overload occurrences with timestamps—critical for FDA 21 CFR Part 11 compliance when paired with validated third-party data acquisition software. No internal memory stores raw weight histories; data transmission is real-time and unbuffered, minimizing security exposure in regulated environments.

Applications

• Pharmaceutical manufacturing: Precise formulation of active ingredients and excipients in wet granulation suites where frequent CIP cycles occur.
• Food & beverage QA/QC: Batch verification of portioned meats, cheeses, or ready-to-eat meals on production lines subject to daily steam cleaning.
• Contract packaging: Final weight inspection of blister packs, sachets, or vials prior to cartonization in high-humidity cleanrooms.
• Research laboratories: Reproducible mass measurement of hydrated hydrogels, tissue samples, or electrochemical cells requiring repeated rinsing between trials.
• Chemical distribution centers: Inventory reconciliation of corrosive reagents stored in polyethylene containers exposed to ambient condensation.

FAQ

Is the SJ-3000WP suitable for use in sterile environments?
Yes—its smooth, crevice-free surfaces and IP67 rating support validated autoclave-compatible cleaning agents and vaporized hydrogen peroxide (VHP) decontamination cycles, though direct sterilization via autoclaving is not permitted.
Does it support external calibration with traceable standards?
Yes—internal calibration is performed using factory-installed reference weights; external calibration may be executed at any time using NIST-traceable masses meeting OIML Class F1 or better tolerances.
Can the unit be mounted on a wall or integrated into a conveyor system?
No—the SJ-3000WP is designed exclusively for benchtop use with its integrated feet and leveling screws; no VESA or DIN-rail mounting options are available.
What is the warranty coverage and service support structure?
A&D provides a 2-year limited warranty covering materials and workmanship; global service network includes authorized calibration labs in North America, EMEA, and APAC regions offering on-site verification and repair.
How does the sensor suspension design improve long-term accuracy?
By isolating the EMFC sensor from thermal expansion of the pan support and mechanical shock transmission, the suspended architecture reduces zero drift and maintains linearity across temperature gradients from 10°C to 40°C.