OHAUS Defender 3000 i-D33P Industrial Platform Scale

Overview

The OHAUS Defender 3000 i-D33P is an industrial-grade platform scale engineered for high-reliability performance in demanding production, packaging, warehousing, and logistics environments. Built upon OHAUS’ legacy of precision weighing instrumentation, this model implements a robust load cell architecture based on strain-gauge technology with aluminum sensing elements rated to IP65 — ensuring resistance to dust ingress and low-pressure water jets. Its square-tube structural frame, powder-coated carbon steel construction, and 304 stainless steel pan provide mechanical stability under repeated loading cycles while maintaining long-term calibration integrity. The scale operates across universal AC input (110–240 VAC) and integrates a rechargeable lead-acid battery for uninterrupted operation during power fluctuations or mobile deployment scenarios. Designed for Class III accuracy per OIML R76-1, it supports traceable calibration workflows aligned with ISO/IEC 17025 and ANSI/NCSL Z540-1 standards.

Key Features

• Multi-color backlit LCD display with 6-digit, 7-segment characters (45 mm digit height) ensures legibility under ambient lighting conditions typical of factory floors, loading docks, and warehouse aisles.
• Tri-color visual checkweighing feedback (red/yellow/green) enables immediate pass/fail assessment without operator interpretation — reducing human error and accelerating throughput in QC inspection stations.
• Ruggedized mechanical keypad with tactile response offers reliable actuation in gloved-hand operations and resists wear from repetitive use.
• Modular interface architecture includes standard RS232 for legacy printer and PLC integration; optional USB or Ethernet modules support modern data capture into MES, ERP, or LIMS platforms.
• ABS engineering plastic housing with integrated metal U-bracket allows flexible mounting options — benchtop, wall-mounted, or pedestal-integrated configurations — adapting to spatial constraints in diverse facility layouts.
• IP65-rated aluminum load cell and NEMA 4X-equivalent indicator housing deliver environmental resilience in non-hazardous, dry-to-moderately humid industrial settings.

Sample Compatibility & Compliance

The i-D33P accommodates bulk materials, packaged goods, palletized loads, and discrete components within its 150 kg capacity range and 10 g readability specification. It is certified compliant with OIML R76-1 Class III requirements for non-automatic weighing instruments used in commercial and industrial applications where legal-for-trade verification may be required. Calibration procedures support documented traceability to national metrology institutes via accredited service providers. The system conforms to electromagnetic compatibility (EMC) directives (IEC 61326-1) and safety standards (IEC 61010-1), making it suitable for installation in facilities subject to GLP or GMP-aligned quality systems. While not intrinsically safe, its design meets general-purpose industrial electrical safety expectations for non-explosive atmospheres.

Software & Data Management

Data output is protocol-agnostic via RS232 serial transmission using ASCII-based command sets compatible with most label printers, barcode scanners, and programmable logic controllers. Optional USB or Ethernet interfaces enable direct connection to Windows-based PCs running OHAUS Explorer software (v3.0+), supporting configurable data logging, real-time graphing, batch export to CSV/Excel, and audit-trail generation. All communications adhere to standard serial framing conventions (9600 baud, 8N1), with optional handshaking for deterministic packet delivery. Firmware updates are performed locally via USB flash drive, preserving configuration integrity and minimizing downtime. No cloud dependency or proprietary cloud services are embedded — all data remains under user control at the edge.

Applications

• Production line checkweighing of filled containers, bottles, or cartons against preset tolerance bands.
• Inventory reconciliation and cycle counting in distribution centers using piece-count mode with automatic average piece weight calculation.
• Accumulation of sequential weighments for batch formulation or raw material dispensing logs.
• Shipping manifest verification prior to palletization, including gross/net/tare weight tracking.
• Quality assurance audits requiring documented weight records with timestamp, operator ID, and calibration status metadata.
• Work-in-progress (WIP) monitoring in lean manufacturing cells where rapid, repeatable weight validation supports just-in-time workflows.

FAQ

What is the maximum overload protection rating for the i-D33P load cell?
The aluminum load cell is designed to withstand up to 150% of full-scale capacity without permanent deformation or zero shift, consistent with OIML R76-1 mechanical overload specifications.
Can the scale be calibrated internally without external weights?
No — internal calibration is not supported. Calibration requires certified test weights traceable to national standards, applied directly to the pan in accordance with manufacturer-recommended procedures.
Is the battery replaceable by the end user?
Yes — the sealed lead-acid battery is field-replaceable using standard tools and does not require recalibration after replacement.
Does the scale support Modbus RTU or TCP protocols?
Not natively. Modbus communication requires third-party gateway hardware or custom firmware adaptation; only ASCII serial commands are provided out-of-the-box.
What is the operating temperature range for continuous use?
The indicator and load cell are rated for continuous operation between 0 °C and 40 °C (32 °F to 104 °F) at relative humidity ≤ 80% non-condensing.