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Lutron
The Lutron FR-5120 is a digital fruit hardness tester (fruit sclerometer) for measuring the firmness of apples, pears, strawberries, grapes and other large/hard or small/soft fruits. Firmness is a key indicator of ripeness, so the instrument helps fruit research departments, fruit companies, farms and agricultural universities judge maturity and make better decisions on harvest, storage and transport.
It measures up to 20.00 kg (196.10 N / 44.10 lb) with a resolution of 0.01 kg and an accuracy of ±(0.5% + 2 digits) at 23 ± 5 °C. A load cell transducer and microprocessor circuit give stable readings, and the overload capacity is 30 kg.
The tester works in compression and tension, with a peak hold function that freezes the maximum force reached as the tip penetrates the fruit. Readings appear on a large 5-digit backlit LCD that can be reversed for comfortable reading in either orientation, with selectable units of kg, N or lb and fast (0.2 s) or slow (0.6 s) update.
Four penetrometer tips of 3, 5, 8 and 11 mm are supplied with a hard carrying case. Mounting holes on the back allow the gauge to be fitted to the optional FS-1001 test stand for more repeatable results, and an RS-232 output allows connection to a PC with the optional cable and software.
Product Type Digital Fruit Hardness Tester
Brand Lutron
Model FR-5120
Measuring Capacity 20.00 kg / 44.10 lb / 196.10 N
Resolution 0.01 kg / 0.01 lb / 0.05 N
Minimum Display 0.02 kg / 0.07 lb / 0.3 N
Accuracy ±(0.5% + 2 digits), within 23 ± 5 °C
Overload Capacity Max. 30 kg
Function Tension & compression; normal force and peak hold
Units kg / N / lb
Display 5-digit LCD, 16 mm digit height, backlit, reversible
Update Time Fast approx. 0.2 s; slow approx. 0.6 s
Transducer Load cell
Data Output RS-232 serial computer interface
Power Supply 6 × 1.5 V AA batteries or DC 9 V adapter (adapter not included)
Power Consumption Approx. DC 28 mA
Operating Conditions 0 to 50 °C; less than 80% RH
Dimensions 215 × 90 × 45 mm
Weight 650 g (with batteries)
Accessories Included Penetrometer tips 3 mm, 5 mm, 8 mm and 11 mm; carrying case; operating manual
Optional Accessories Test stand FS-1001; RS-232 cable UPCB-01; USB cable USB-01; SD card data recorder DL-9602SD; software SW-U801-WIN
Penetrometer tips 3 mm, 5 mm, 8 mm and 11 mm; carrying case; operating manual