OHAUS Defender 3000 Waterproof Floor Scale

Overview

The OHAUS Defender 3000 Waterproof Floor Scale is an industrial-grade weighing platform engineered for high-reliability operation in demanding wet, washdown, and hygienic environments. Built on a robust mechanical architecture grounded in precision load cell technology, the Defender 3000 employs a hermetically sealed IP67-rated stainless steel load cell—capable of maintaining metrological integrity under continuous exposure to water jets, chemical splashes, and high-humidity conditions. Its structural design conforms to Class III accuracy requirements per NTEP (National Type Evaluation Program) and meets CE marking directives for non-automatic weighing instruments (NAWI Directive 2014/31/EU). Unlike general-purpose floor scales, the Defender 3000 integrates metrological stability with environmental resilience—making it suitable for applications where repeated cleaning, frequent sanitation cycles, or ambient moisture would compromise conventional scale performance.

Key Features

• Full 304 stainless steel construction: Includes load-bearing platform, removable pan, vertical support column, U-shaped stabilizing bracket, and internal indicator housing—ensuring corrosion resistance across all structural and functional surfaces.
• Dual-display configuration: User-selectable backlit monochrome LCD (optimized for indoor ambient light) or high-contrast red LED display (engineered for visibility in low-light, steam-filled, or outdoor settings).
• IP66-rated indicator enclosure: Features a flip-open front cover secured by four captive stainless steel sealing screws, enabling rapid access for calibration verification or service without compromising ingress protection.
• Integrated rechargeable power system: Sealed lead-acid battery supports extended cordless operation—up to 60 hours for LCD models and 30 hours for LED models under default auto-off timing (15-minute idle timeout).
• Four-button intuitive interface: Dedicated keys for zero, tare, unit toggle, and function selection—minimizing training time and reducing operational error in fast-paced production or logistics workflows.
• RS232 serial communication port: Standard interface supports bi-directional data exchange with label printers, PLCs, SPC software, or enterprise MES systems—enabling real-time weight capture, batch logging, and traceability integration.

Sample Compatibility & Compliance

The Defender 3000 accommodates diverse industrial payloads—from bulk raw materials (e.g., bags of powder, palletized components) to finished goods in food processing, pharmaceutical manufacturing, and chemical distribution. Its 304 stainless steel surface finish complies with FDA 21 CFR Part 110 (Current Good Manufacturing Practice in Manufacturing, Packing, or Holding Human Food) for equipment contact surfaces. While not intrinsically rated for explosive atmospheres (ATEX/IECEx), its ingress protection and material certification align with ISO 22000 hygiene management systems and support validation under GMP and HACCP frameworks. NTEP Class III certification ensures legal-for-trade use in commercial transactions involving weight-based pricing or regulatory reporting in North America.

Software & Data Management

The scale operates autonomously without external software but supports standardized ASCII protocol over RS232 for seamless integration into existing QA/QC infrastructure. When connected to compatible host systems, it transmits stable weight readings with optional metadata—including timestamp, gross/net/tare values, unit code, and mode identifier. Optional OHAUS AC-USB or AC-RS232 adapters enable direct connection to Windows/Linux workstations running third-party data acquisition tools compliant with 21 CFR Part 11 audit-trail requirements. No proprietary drivers are required; native COM port enumeration allows immediate plug-and-play functionality within LabVIEW, Excel VBA, or custom Python-based monitoring scripts.

Applications

• Food & beverage processing: In-line checkweighing of filled containers prior to case packing; ingredient batching in wet mixing zones.
• Pharmaceutical manufacturing: Weighing of API drums, excipient totes, or intermediate product transfers in cleanroom-adjacent staging areas.
• Chemical handling: Verification of drum/tote fill levels for hazardous or hygroscopic substances requiring frequent rinsing of containment surfaces.
• Recycling & waste management: Gross vehicle weight estimation at weighbridge entry points with portable deployment capability.
• Agricultural cooperatives: Field-side weighing of harvested produce under variable weather conditions without shelter dependency.

FAQ

Is the Defender 3000 certified for trade use in the United States?
Yes—the model is NTEP-approved as Class III, authorizing its use in commercial transactions where weight determines price or regulatory compliance.
Can the scale be calibrated onsite using standard test weights?
Yes—it supports internal calibration via user-accessible menu functions and external calibration using Class M1 or M2 certified weights traceable to NIST standards.
Does the RS232 interface support Modbus RTU or only ASCII output?
The standard firmware outputs ASCII-formatted weight strings only; Modbus RTU requires optional firmware upgrade and dedicated communication module (sold separately).
What is the maximum recommended operating temperature range?
The indicator operates reliably between –10 °C and +40 °C; the load cell maintains specification compliance from –10 °C to +45 °C.
Is the battery replaceable by the end user?
Yes—the sealed lead-acid battery is field-replaceable using standard Torx T10 tools; replacement part number is OHAUS 82111593.