Check the listing for details. Brix 0-90 Coffee TDS Salinity Honey Specific Gravity Digital Refractometer. Condition: New. Listed at 149.00 USD. The RR1090 is a multi-scale, digital, differential refractometer with Bluetooth output and cloud spreadsheet logging capabilities. The raw refractive index of an aqueous or semi-aqueous sample, such as honey, is measured using our proprietary FresnelZoom algorithm and technology. The sample well temperature is monitored using a high precision thermocouple while a multitude of derived scales are provided from the raw index. Measure and track Brix, specific gravity, coffee total dissolved solids (TDS), water in honey. Track salt-water aquarium salinity according to refractive index data from Scripps*. Measure %w/w for methanol, propylene glycol, ethylene glycol, glycerol or ethanol. Use the RRTool/RRToolPro mobile app to log measurements in real-time to your private cloud spreadsheet, to enable extra device features (ATC, QRcode generation) or to upgrade the firmware on the device. Note that RRTool/RRToolPro is available for purchase on Android only at this time. Operating dominant wavelength: 589nm (sodium line)Range*: 1.3329-1.5234 (0-90 BRIX)Resolution: 10-4 RIU** ( 0.1 BRIX / 0.1% NaCl)Accuracy: 2×10-4 RIU ( 0.2 BRIX/ 0.2% NaCl)Outputs (scales): raw index, Brix, specific gravity, coffee total dissolved solids, salinity, H2O in honey, methanol, propylene glycol, ethylene glycol, glycerol, ethanolTemperature range: 10-40 C (for optimal ATC)Temperature scale: both C and FTemperature resolution: 0.1 C / 0.1 FTemperature accuracy: 0.5C/1FAuto temperature compensation: yes (selective scales, requires RRTool to enable the functionality)Battery: 1 x 9VAuto timer shut-off: 3 minutes (without button presses)IOT: output to cloud spreadsheet via optional RRTool/RRToolPro mobile appCompliance: FCC part 15 class B digital device