300 g Precision Balance 0.001 g Readability Internal Auto Calibration USB, Glass Draft Shield 3-Slide Doors - KERN
€600.00
Product information "300 g Precision Balance 0.001 g Readability Internal Auto Calibration USB, Glass Draft Shield 3-Slide Doors - KERN"
Take advantage of the combination of high-resolution weighing (0.001 g), internal automatic calibration and straightforward data export via USB for reliable, traceable measurement workflows; order the balance directly via Metav Werkzeuge or contact our consultants for application advice.
KERN EWJ 300-3H — Precision laboratory balance, 300 g capacity, 0.001 g readability
The KERN EWJ 300-3H is a compact precision balance designed for laboratories, quality control and jewellery work, combining fine resolution with automated calibration and robust data handling
- Internal auto-calibration every 2 h
- Readability 0.001 g for high precision
- USB interface for data export
- Large glass draft shield with 3 sliding doors
Consistent high-resolution performance for exact results
Built for tasks that demand repeatable accuracy, this compact laboratory balance delivers 0.001 g readability with a reproducibility of 0.002 g and a linearity of ±0.005 g. The measuring principle is a strain gauge system, which converts mechanical load into an electrical signal for stable results; this method is widely used in metrology for its reliability under routine conditions. For piece-counting workflows, the instrument distinguishes small quantities with a minimum reference mass of 2 mg in the laboratory counting mode (20 mg in standard mode), ensuring precise inventory control and parts counting in production sampling.
Automated calibration and stable operation even off the bench
Accuracy is sustained by the instrument’s internal automatic calibration, activated on a timed cycle (every 2 hours) to compensate for temperature drift and changing ambient conditions. This internal routine removes the need for external weights during routine operation and supports location-independent accuracy, which is particularly valuable where laboratory conditions vary. The balance is specified for an ambient temperature range of 15 °C to 35 °C and maximum relative humidity of 80%, helping maintain measurement integrity in typical workshop and laboratory environments.
Efficient data handling and user-focused operation
Workflow efficiency is enhanced by a dedicated control panel where each main function has its own key, allowing rapid switching between modes without menu navigation. A USB interface transfers weighing data to a PC or printer for documentation and traceability, while a rising capacity bargraph indicates remaining weighing range to avoid overload. The clear LCD display with 16.5 mm digit height supports quick reading of results, and the large glass draft shield with three sliding doors provides easy access to the weighing chamber (B×T×H: 155×175×217 mm) while protecting the sample from air currents.
Durable design and versatile application range
Engineering choices focus on durability and practical laboratory use: the stainless steel weighing pan and included protective cover make daily cleaning straightforward, and the instrument’s compact housing (220 × 340 × 321 mm) and 3.57 kg mass make it suitable for bench-top placement or transport between quality-control stations. Power supply is universal (100–240 V, 50/60 Hz) with international adapter plugs (CH; EURO; UK; US); an internal battery is available as an option with approx. 12 h charging time for temporary portable use. Typical application areas include jewellery and gold trading, quality control, dental laboratories, and plastics technology, where small-scale precision weighing is required.
For laboratory-grade accuracy and traceable data workflows, contact Metav Werkzeuge to discuss the KERN EWJ 300-3H, check suitability for specific applications and arrange prompt delivery from Emmerich — eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930
Technical data
- Article number: EWJ
- SKU: EWJ.300-3H
- GTIN: 4045761144903
- Manufacturer: KERN
- Origin country: CN
- HS code: 90160010
Numbers / Core technical data
- Weighing capacity: 300 g
- Readability: 0.001 g
- Reproducibility: 0.002 g
- Linearity: ±0.005 g
- Weighing pan diameter: 80 mm
- Weighing chamber (B×T×H): 155 × 175 × 217 mm
- Display digit height: 16.5 mm
- Operating temperature: 15 °C–35 °C
- Max relative humidity: 80%
- Dimensions (W×D×H): 220 × 340 × 321 mm
- Weight: 3.57 kg
- Power input: 100 V–240 V, 50 / 60 Hz
- Battery charge time (optional internal): 12 h
Design / Special features
- Stainless steel weighing pan
- Internal automatic calibration, timed every 2 h
- USB data interface for PC/printer connection
- Large glass draft shield with 3 sliding doors
- Strain gauge weighing system
- Capacity bargraph indicator
- Dedicated main-function keys for intuitive operation
- Protective cover included
- International adapter plugs: CH; EURO; UK; US
- Suitable applications: jewellery, quality control, laboratories, dental labs, plastics technology
- Minimum piece weight for counting: 2 mg (laboratory counting), 20 mg (standard)
FAQ
What calibration routine does the balance use?
The KERN EWJ 300-3H uses an internal automatic calibration cycle (timed every 2 hours) to maintain accuracy without external weights during normal operation.
Can weighing data be exported to a PC or printer?
Yes — the balance offers a USB interface to transfer weighing data directly to a PC or compatible printer for documentation and traceability.
Is the balance suitable for jewellery and small-part counting?
The compact precision balance is designed for fine measurements and piece counting; the smallest reference mass for counting is 2 mg in laboratory mode, supporting jewellery and small-part workflows.
How does the draft shield improve measurement reliability?
The large glass draft shield with three sliding doors reduces air currents around the sample, stabilising readings and allowing safe access to the weighing chamber during delicate operations.
What power options are available for mobile use?
The instrument is supplied with a universal mains adapter (100–240 V) and international plugs; an internal battery is available as an option with a typical charge time of 12 hours for temporary portable operation.
Which industries benefit most from this balance?
Typical applications include jewellery and gold trading, quality control in production environments, dental laboratories and plastics technology where high-resolution, repeatable weighing is required.
Metav Werkzeuge, Emmerich am Rhein, Germany — eMail: info@metav-werkzeuge.com — Tel: +49 2822 7131930 — WhatsApp: +49 170 2837271