Overview
Enviro Testers digital auto refractometer for measuring the refractive index of an unknown gemstones, it covers the full range from 1.40 to 3.00. It gives a quick and reliable differentiation of diamonds and imitations colored stones from their many imitations. If the instrument has been subjected to rough handling in shipment, or if your environment is very different in temperature, calibration adjustment may be required.
Features
- Turn on the ON button
- Press TEST button until the CAL appears
- When the screen display 1.48 in (3.77 cm), place on test platform
- Press test button, now the screen display 1.806 in (4.587 cm)
- When the screen display END, the calibration is finished
Technical Specifications
| Test Range | 1.400 to 2.000 |
| Power Input | 9 V Battery |
| Measuring Range | 1.30 to 1.81 |
| Measurement Accuracy | 0.2% |
| Working Temperature | 50 °F to 82 °F (10 °C to 28 °C) |
| Size | 1.18 in x 1.18 in x 5.11 in (3 cm x 3 cm x 13 cm) |
| Weight | (14.10 oz 400 g) |
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