The Bernardo CW 3000 hook dynamometer is a suspended load weighing instrument with a maximum capacity of 3,000 kg and a measurement accuracy of 1 kg. Dimensions H 315 mm × W 430 mm × C 540 mm, weight approx. 15 kg. It is directly applied to hoists, cranes, and lifting systems to weigh the suspended load in real-time, with a digital LED display for immediate reading. Suitable for warehouses, workshops, loading/unloading sites, and load control on jib cranes or winches. Distributed in Italy by Krollit as the official Bernardo distributor since 2007.
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Maximum load: 3,000 kg
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Measurement accuracy: 1 kg
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Percentage resolution: ~0.03%
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Dimension A (height): 315 mm
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Dimension L (width): 430 mm
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Dimension C (hook development): 540 mm
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Instrument weight: approx. 15 kg
Who uses the CW 3000 and for what purpose
The Bernardo CW 3000 is an electronic hook dynamometer sized for weighing suspended loads up to 3,000 kg with an accuracy of 1 kg (approximately 0.03% of full scale). The typical application is in-line suspension with hoists, jib cranes, winches: the instrument is placed between the lifting system and the load to read the actual lifted weight in real-time. For weighing medium mechanical components, industrial semi-finished products, standard containers in professional workshops and commercial warehouses. The large-digit LED display allows reading the weight even from a distance during loading operations, a crucial feature for applications on construction sites or in warehouses with reduced visibility. The typical battery life is 50-70 hours of actual use. In Krollit's customers' laboratories, the CW 3000 is chosen by mechanical workshops for checking the weight of lifted parts, logistics warehouses for weighing suspended packages, carpentry shops for verifying the weight of structures, and construction sites for controlling loads during crane handling.
Its place in the Bernardo range
The Bernardo CW hook dynamometer range is organized into 7 models ordered by capacity and accuracy: CW 500 (500 kg, ±0.2 kg), CW 1000 (1,000 kg, ±0.5 kg), CW 2000 (2,000 kg, ±1 kg), CW 3000 (3,000 kg, ±1 kg), CW 5000 (5,000 kg, ±2 kg), CW 10000 (10,000 kg, ±5 kg), CW 15000 (15,000 kg, ±5 kg). Absolute accuracy decreases with increasing capacity, but percentage accuracy remains constant (approximately 0.03-0.05% of full scale).
The CW 3000 model is mid-range. Suitable for workshops with typical loads up to 2400 kg. The ±1 kg accuracy is consistent with the capacity. Below: CW 1000/500 for lighter loads with higher accuracy. Above: CW 5000 and beyond for industrial loads.
Difference with the Bernardo ID series: CW dynamometers are electronic for WEIGHING; ID hooks are mechanical for LIFTING (without weight measurement). For mixed lifting + weighing applications, use a CW; for lifting only, IDs are significantly cheaper.
Krollit Logistics and Support
Bernardo shipping in 5-9 business days (7 days to the South). With a weight of approx. 15 kg, it is shipped in a single protective package and easily handled by one person. Chains, ropes, slings, complementary accessories and original Bernardo spare parts available from stock with shipping in 3-5 business days. Conformity documentation EN 1677 (for ID hooks) or instrument calibration (for CW dynamometers) included in the package. Customer support available in Italian.
Who the CW 3000 is for
| Profile |
Compatibility |
Reason |
| Passionate hobbyist |
Adequate |
Professional tool; for hobby use it is oversized unless for specific applications involving heavy lifting. |
| Mechanical workshop with part weight control |
Recommended |
Real-time weighing during lifting for verification of actual part weight. ±1 kg accuracy suitable for standard workshop loads. |
| Logistics warehouse with hoists/cranes |
Recommended |
For weighing suspended packages before loading/unloading. LED display visible from a distance, 50-70 hours of actual use autonomy. |
Not suitable for: applications with loads exceeding 3,000 kg (risk of instrument damage); applications requiring accuracy higher than 1 kg (consider lower capacity models in the same CW series); environments with continuous vibrations (digital reading may fluctuate; the instrument is sized for static weighing); environments with extreme temperatures outside the typical -10/+40°C range for industrial electronic instruments; applications requiring legal metrological certification (initial factory calibration, but not legal certification for commercial weight transactions).
Weighing capacity
| Specification |
Value |
| Maximum load (capacity) |
3,000 kg |
| Measurement accuracy |
1 kg |
| Percentage resolution (% full scale) |
~0.03% |
Dimensions and weight
| Specification |
Value |
| Dimension A (height) |
315 mm |
| Dimension L (width) |
430 mm |
| Dimension C (hook development) |
540 mm |
| Instrument weight |
approx. 15 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
| Directive |
Measuring instruments for industrial use |
Standard equipment
- Bernardo CW 3000 hook dynamometer
- Large digit digital LED display
- Integrated rechargeable batteries
- Mains charger
- Initial factory calibration documentation
- User manual in Italian
Frequently Asked Questions
What is the difference between the CW 3000 and a bench scale?
The hook dynamometer weighs suspended loads (suspended from hoists, cranes, winches); the bench scale weighs loads placed on it. These instruments are for completely different applications: the dynamometer is essential where the load cannot be placed on a surface (large packages, engines, materials suspended during handling).
The hook dynamometer is placed between the lifting system and the load: the upper hook attaches to the hoist, the lower hook to the load. The internal load cell measures the tensile force and converts it into weight displayed on the LED display. For static applications on a balance, a bench/floor scale is the correct choice.
Is the instrument certified for commercial use (weight transactions)?
No, the CW 3000 is an industrial instrument factory calibrated but NOT metrologically certified for commercial use (purchase/sale transactions by weight). For commercial use, MID (Measuring Instruments Directive) certification issued by an accredited body is required.
For internal industrial applications (checking part weights, load verification, weighing for internal logistics), factory calibration is sufficient. For commercial applications (selling materials by weight, invoicing based on weight), MID certification with a green 'M' label and official metrological stamp is mandatory: contacts are available from certification bodies such as INRIM or equivalent.
How long does the battery last in daily use?
Typical battery life is 50-70 hours of actual continuous use. In daily artisanal use (10-30 minutes per day), the battery lasts 2-4 weeks before requiring recharging.
The integrated rechargeable batteries can be replaced by an authorized Bernardo service center. For continuous intensive use, a mains charger should always be available in the workshop, or the instrument should be kept charged when not in use. The auto-shutdown mode after inactivity significantly extends battery life.
Is the ±1 kg accuracy (0.03% of full scale) truly significant?
For standard industrial applications, yes. For a maximum load of 3,000 kg, the relative error is approximately 0.03%. For typical working loads (50-80% of full scale), the relative error is slightly higher but remains below 0.1%.
For industrial part weight control (motors, mechanical components, crates), the ±1 kg accuracy is correctly dimensioned. For applications requiring higher absolute accuracy (e.g., weighing jewelry, high unit value materials), laboratory dynamometers or precision scales are recommended, not industrial instruments.
How does the periodic calibration procedure work?
For standard industrial use, annual periodic verification with certified standard weights is recommended. The instrument allows correction of the calibration factor through the procedure indicated in the manual.
Periodic verification can be done in the workshop with standard weights of adequate capacity (e.g., a 100 kg standard weight for CW 500). For formal annual certification, contact ACCREDIA accredited calibration centers or equivalent. For internal industrial control use, initial factory calibration is sufficient for most application cycles.
