Product Description Apogee quantum sensors .... 410 nm to 655 nm ( wavelengths where response is greater than 50 % of maximum) Directional ( Cosine) Response: 0.06 Â ± 0.06 % per C Temperature....
https: / / www.youtube.com/ watch? v= -bTB1pGPGq0 .... 1.0% of the reading or 1.0 Â µ S/ cm, whichever is greater 10- 20- or 30-m cable, Â ± 2.0% of the reading or 1.0 Â µ S/ cm, whichever is greater....
HI 9835 Portable EC/ TDS/ NaCl/  ° C Meter .... reading (  ± 0.03 mg/ L ( ppm) or 1 digit, whichever greater) NaCl  ± 1% of reading Temperature  ± 0.2 ° C ( excluding probe error) ....