Specification Brand : DFROBOT BulletPoint1 : This is an TDS (Total Dissolved Solids) Meter with gravity interface compatible with Arduino BulletPoint2 : Good Compatibility Output: 0~2.3V analog signal output, compatible with 5V or 3.3V controller BulletPoint3 : AC Excitation Source: effectively prevent probe from polarization. Probe is waterproof BulletPoint4 : Easy to Use: simple connection, plug and play without soldering ExternallyAssignedProductIdentifier : 6959420912865 ItemName : Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino ItemPackageDimensions_Height : 12.1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 8.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-conductivity-meters-and-accessories Manufacturer : DFROBOT ModelNumber : SEN0244 PartNumber : SEN0244 ProductSiteLaunchDate : 2020-03-27T10:24:17.954Z SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 46171600