OHAUS Navigator® NV2201ZH Portable Precision Balance
| Brand | OHAUS |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | NV2201ZH |
| Instrument Type | General-Purpose Portable Balance |
| Maximum Capacity | 2200 g |
| Readability | 0.1 g |
| Repeatability | 0.1 g |
| Calibration Method | External |
| Overload Protection | Up to 400% of full scale |
| Transport Lock | Integrated mechanical lock for load cell protection |
Overview
The OHAUS Navigator® NV2201ZH is a robust, general-purpose portable precision balance engineered for reliable mass measurement in dynamic environments—including quality control laboratories, production floors, educational institutions, and field-based research settings. Utilizing electromagnetic force restoration (EMFR) technology, the NV2201ZH delivers stable, drift-compensated readings with high reproducibility across ambient temperature fluctuations and minor mechanical disturbances. Its 2200 g maximum capacity and 0.1 g readability provide sufficient resolution for routine weighing tasks such as sample preparation, formulation checks, inventory reconciliation, and packaging verification—without requiring laboratory-grade environmental controls. Designed with industrial durability in mind, the unit features an impact-resistant ABS housing, reinforced stainless-steel weighing pan (160 mm diameter), and sealed keypad to resist dust and incidental spills. The integrated transport lock safeguards the electromagnetic sensor during shipment or relocation, preserving long-term calibration integrity.
Key Features
- Electromagnetic force restoration (EMFR) sensor architecture ensures consistent linearity and minimal zero drift over time.
- Four-fold overload protection (up to 8800 g) prevents mechanical damage from accidental overloading—critical in fast-paced industrial workflows.
- Stabilization time ≤1.0 second under standard conditions (per OHAUS internal test protocol ISO 9001–aligned), enabling high-throughput batch weighing.
- Backlit LCD display with 20 mm character height supports legibility in low-light or mixed lighting environments.
- Auto-zero tracking and auto-tare functions reduce operator dependency and minimize procedural variability.
- Integrated mechanical transport lock engages automatically when power is disconnected, eliminating need for external locking hardware.
- IP42-rated enclosure provides basic protection against solid particulates and vertically dripping moisture—suitable for non-critical cleanroom zones (ISO Class 8) and workshop use.
Sample Compatibility & Compliance
The NV2201ZH accommodates a broad range of sample forms—including powders, granules, liquids in containers, pre-weighed vials, and small mechanical components—within its 160 mm pan diameter and 120 mm vertical clearance. It complies with international metrological requirements per OIML R76-1 (2021 edition) for Class III non-automatic weighing instruments. While not certified for pharmaceutical GMP or FDA 21 CFR Part 11 compliance out-of-the-box, the balance supports audit-ready documentation when used with validated SOPs and periodic external calibration traceable to NIST or BIPM standards. Routine verification can be performed using Class M2 or Class F1 weights per ASTM E898–22. The device meets CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU LVD Directive) and RoHS 2011/65/EU material restrictions.
Software & Data Management
The NV2201ZH includes RS232 serial interface (DB9 male) for direct connection to PCs, label printers, or PLC systems. It supports ASCII-based data output in standard format (e.g., “S: +2156.3 g”) with configurable baud rates (9600–115200 bps), parity, and termination characters. Optional OHAUS AC software (v3.5+) enables real-time data logging, statistical analysis (mean, SD, CV%), and export to CSV or Excel formats. All weight records include timestamp, gross/net/tare flags, and stability indicators. For regulated environments, users may implement manual audit trails; however, electronic signature, user-level access control, and 21 CFR Part 11-compliant electronic records require integration with validated third-party LIMS or ELN platforms.
Applications
- Raw material receipt inspection in food, chemical, and polymer manufacturing.
- Batch ingredient dispensing and recipe verification in pilot-scale production.
- Student laboratory exercises in chemistry, biology, and materials science curricula.
- Field-based environmental sampling where portability and battery operation (optional AC adapter) are essential.
- Workshop calibration checks for lower-resolution scales using traceable reference weights.
- Shipping and logistics weight verification prior to labeling and dispatch.
FAQ
What is the recommended calibration frequency for the NV2201ZH?
Calibration should be performed before first use, after relocation, following any physical shock, and at least once per shift in continuous operation environments—per ISO/IEC 17025:2017 Clause 7.8.2 guidelines.
Can the NV2201ZH operate on battery power?
No—the NV2201ZH requires continuous AC power via included 100–240 V, 50/60 Hz adapter; it does not feature internal rechargeable batteries.
Is the weighing pan removable for cleaning?
Yes—the stainless-steel pan is secured with a single central screw and can be removed without tools for thorough decontamination.
Does this model support internal calibration?
No—calibration is external only, requiring certified test weights; no motorized or built-in calibration mass is present.
What environmental conditions affect measurement stability?
Air currents exceeding 0.2 m/s, ambient temperature gradients >1 °C/hour, or vibrations from nearby machinery may increase stabilization time beyond 1 second; placement on a rigid, level surface is mandatory.
