Specifications: ? pH Range:0.00 to 14.00 ? pH Accuracy:+/-0.01 ? mV Range:+/-1999 ? mV Accuracy:+/-0.1 ? Temperature Range:-5 DEG to +100 DEG C ? Temperature Accuracy:+/-0.5 DEG C ? Conductivity Range:0.00 ?S to 199.9 mS (auto ranging) ? Conductivity Accuracy:+/-1% full scale ot +/-1 digit ? TDS Range:0.00 ppm to 200 ppt (auto ranging) ? TDS Accuracy:+/-1% full scale ot +/-1 digit ? Dim. W x D x H in. (mm):3.5 x 2.0 x 8.0 (90 x 50 x 204).