OHAUS precision balance PR Series Precision
The OHAUS PR Series Precision precision balance is a versatile laboratory balance that is suitable for various routine tasks such as simple weighing, piece counting and weighing in per cent. Its robust design, user-friendly operation and precise measurement technology make it a reliable solution for laboratories, educational institutions and industrial applications. With a pioneering combination of RS232 interface for data communication, backlit LCD display and optional internal calibration, this series offers a convincing price-performance ratio compared to similar models.
Performance features and design
This series of scales is designed to deliver accurate results with repeatable measurements while ensuring economical operation. The classic ABS housing construction combines durability with a space-saving footprint. The removable stainless steel weighing pan withstands daily use, while the integrated draft shield (for versions up to 520 g) stabilises samples that require protection. The following points should be emphasised, particularly in everyday laboratory work or in industrial quality control:
- Maximum load selectable from 220 g to 6200 g, depending on model
- Readability from 0.001 g for ultra-fine weighing or 0.1 g for higher load ranges
- Internal semi-automatic InCal system for adjustment at regular intervals on request
- RS232 interface for professional data exchange with PCs or printers
- Robust stainless steel platform and a removable glass draft shield (on selected models)
- Possible calibration according to OIML (certified models for certain weight classes)
- Intuitive LCD display with backlight and fast stabilisation (from 1 second)
Other practical features include an automatic tare function, adjustable environmental filters to prevent interference, an optional underfloor weighing hook and various measuring modes. The scales offer a simple menu with lockout functions to protect important settings.
Concrete areas of application
In laboratories, substances such as powders, granulates or liquids can be precisely determined in order to obtain sufficiently accurate recipes for test preparations or quality controls. Thanks to the variable weighing surface and piece counting mode, these scales are also interesting for assembly and packaging lines. They can also be used in research, where precise results are essential for sample preparation or analysis. Typical examples:
- Recording the smallest quantities of powder and solids in chemistry or biology laboratories
- Checkweighing on production lines in industrial environments
- Research and development for accurate weighing of samples during experiments
- Overview analyses of foodstuffs with regard to weight and ingredients
- Pharmacies and healthcare for testing and filling various substances
Questions and answers (FAQ)
How is the calibration performed?
The internal models have a semi-automatic InCal function. Calibration is initiated via the scale menu, whereupon internal weights take over the adjustment without the need for external weights.
What are the advantages of an RS232 interface?
Measurement data can be transferred directly to computerised systems, laboratory information management systems (LIMS) or an external printer via RS232. This makes it easier to document and analyse measurement results.
Is the draft shield included with all models?
Only models with very fine readability (0.001 g) and lower maximum loads have a glass draft shield. Models with a higher load capacity work without a draft shield, but are also robust enough for light environmental influences.
Can individual units also be programmed?
Yes, in addition to standardised units such as grams, ounces or carats, customer-specific measurements can also be stored. This is useful, for example, if company-specific weight standards apply in certain applications.
How robust is the stainless steel bowl?
The bowl of the scale can withstand daily wear and tear. Stainless steel is also easy to clean and resists chemical substances better than simple plastic platforms, which favours a long service life.
What certifications are available
Some models are OIML-certified, which means they are approved for custody transfer applications. This is important in environments where official regulations must be complied with.
How fast is the display stable?
Depending on the model and load, a stable measurement result is often displayed in just 1 to 2 seconds, which speeds up work processes and significantly increases sample throughput.
Summary
The PR Series enables precise, reproducible weighing with a wide weighing range and simple operation. Their durability thanks to high-quality materials, numerous connectivity options and optional legal-for-trade versions make the devices extremely versatile. Thanks to the combination of LCD backlighting, fast stabilisation time and practical filters, the series impresses in many sectors, whether in research laboratories, educational establishments or industrial production facilities. This provides professionals with a reliable knife solution that can handle even demanding routine tasks with ease.
|
Readability (d):
|
0.001 g0.01 g0.1 g1 g
|
|
Scale type:
|
Portable balancesprecision balanceCompact scaleLaboratory scaleBench scale
|
|
Weighing surface W x D:
|
diameter 120 mmDiameter 180 mm
|
|
Weighing range max.:
|
220 g420 g520 g1,6 kg2.2 kg4.2 kg6.2 kg
|
|
Linearity:
|
± 0.002 g± 0,02 g± 0.2 g
|
|
Reproducibility:
|
0,001 g0.01 g0.1 g
|