METTLER TOLEDO HPD Handheld Powder Dispenser
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | HPD Handheld Powder Dispenser |
| Capacity Range | 100–200 g |
| Maximum Capacity | 100 g |
| Readability | 0.001 g (1 mg) |
| Repeatability | 1 mg |
| Instrument Type | Precision Powder Dispensing System |
Overview
The METTLER TOLEDO HPD Handheld Powder Dispenser is an ergonomically engineered, manual precision dispensing tool designed for controlled, gravimetric powder handling in regulated laboratory environments. Unlike conventional spatula-based or volumetric transfer methods, the HPD operates on a closed-loop, balance-integrated principle: it continuously communicates with a compatible METTLER TOLEDO analytical or precision balance via RS232 or USB interface, enabling real-time mass feedback during dispensing. This architecture ensures that each dispense event terminates precisely when the target mass—down to 0.5 mg—is achieved, eliminating overshoot and iterative correction. The device is not a standalone scale but a purpose-built peripheral instrument engineered for high-reproducibility manual dosing of fine powders, APIs, catalysts, reference standards, and other high-value or hazardous solids where operator safety, sample integrity, and audit-ready documentation are critical.
Key Features
- Ergonomic handheld design with intuitive trigger-actuated dispensing mechanism—reduces hand fatigue during extended use.
- Integrated bidirectional communication with METTLER TOLEDO balances (e.g., XPR, XSR, and AdvancedLine series) for dynamic mass feedback and endpoint confirmation.
- Sealed powder reservoir with replaceable, single-use or autoclavable dispensing tips—prevents cross-contamination and supports containment of OEL-classified materials (e.g., cytotoxic compounds, potent APIs).
- Calibration traceable to national standards; supports user-performed verification using certified weights per ISO/IEC 17025 requirements.
- Robust housing rated IP54 for resistance to dust and incidental liquid splashes—suitable for cleanroom Grade D and non-sterile QC labs.
- No internal motor or battery—mechanical operation ensures intrinsic safety in solvent-rich or explosion-hazard zones (ATEX Zone 2 / Class I Div 2 compliant when used with appropriate enclosures).
Sample Compatibility & Compliance
The HPD accommodates dry, free-flowing to moderately cohesive powders with particle sizes ranging from 10 µm to 500 µm. It is validated for use with hygroscopic, electrostatic-prone, and low-density materials—including lactose monohydrate, microcrystalline cellulose, paracetamol, and metal oxide catalysts—when paired with anti-static tips and environmental humidity control (<40% RH). Regulatory alignment includes support for GLP and GMP workflows: all dispense events can be logged with timestamp, operator ID, balance serial number, target mass, actual dispensed mass, and deviation—enabling full traceability per FDA 21 CFR Part 11 when used with METTLER TOLEDO LabX software. Device documentation complies with ISO 9001, ISO/IEC 17025, and USP / guidelines for weighing and dispensing accuracy.
Software & Data Management
When connected to LabX laboratory software, the HPD becomes part of a fully auditable digital workflow. LabX captures raw dispense data—including start/stop timestamps, intermediate mass readings at 100 ms intervals, and final mass confirmation—and stores it in a secure, encrypted database with automatic backup. Electronic signatures, role-based access control, and configurable audit trails satisfy ALCOA+ principles. Export options include CSV, PDF reports, and direct integration into LIMS or ERP systems via ODBC or REST API. For standalone operation, the HPD retains no local storage—ensuring zero residual data retention and simplifying compliance with data privacy regulations (GDPR, HIPAA).
Applications
- Preparation of reference standards and calibration samples in pharmaceutical QC laboratories.
- Accurate dosing of active pharmaceutical ingredients (APIs) during early-stage formulation development.
- Dispensing of catalysts and reagents in fine chemical synthesis where stoichiometric precision impacts reaction yield and selectivity.
- Handling of nanomaterials and radioactive tracers under glovebox or isolator conditions—enabled by tip-sealing and minimal operator interaction.
- Quality control testing of excipient flow properties, including hopper discharge studies requiring repeatable small-mass increments.
FAQ
Is the HPD compatible with non-METTLER TOLEDO balances?
No—the HPD requires native firmware-level integration with METTLER TOLEDO balances for real-time mass feedback and endpoint control. Third-party balances lack the required communication protocol and firmware handshake.
Can the HPD be used for liquids or pastes?
No—it is strictly designed for dry, solid particulates. Viscous or adhesive materials will clog the dispensing channel and compromise repeatability.
What maintenance is required?
Daily cleaning of the dispensing tip and reservoir with lint-free wipes and isopropanol; quarterly verification of mechanical actuation force and seal integrity per manufacturer’s SOP.
Does the HPD require calibration certification?
While the HPD itself is not calibrated as a measuring instrument, its performance must be verified alongside the host balance using traceable test weights—documented in accordance with ISO/IEC 17025 clause 6.5.
How is operator training supported?
METTLER TOLEDO provides on-site or virtual validation support, including IQ/OQ documentation templates, SOP drafting assistance, and hands-on dispensing technique workshops aligned with USP Analytical Instrument Qualification.
