PTTestr35 Multi Parameter Test Pen
Technical Parameter:
1.Measurement parameters:pH/TDS/temperature
2.pH
  range: 0.0 to 14.0 pH
  resolution: 0.1 pH
  accuracy:±0.1 pH
  Correction point:up to5drop(automatic)
  Buffer standard: USA, NIST
3.Standard Temperature: twenty-five℃
4.temperature coefficient: 0.0 to 10.0%/℃
5.automatic measurement:correct
6.TDS
  range: 0.0 to 999 ppm;1.00 to 10.00 ppt
  resolution: 1 ppm / 0.01 ppt
  accuracy:Full scale1 %
  Correction point:up to2drop(hand movement)
  coefficient: 0.40 to 1.00
7.temperature
  range: 0.0 to 50.0℃/ 32.0 to 120.0℉
  resolution: zero point one℃/℉
  accuracy:±0.5℃/±0.9℉
8.temperature compensation:automatic/hand movement
9.Automatic shutdown: eight point fiveAutomatic shutdown without operation for minutes
10.liquid crystal display:Double row LCD display(2.1*2.7cm)
11.power supply: 4*1.5 VButton cell
12.BATTERY LIFE:& gt 150hour
13.size/weight: 16.5cm*3.8cm/90g(stand-alone)
   18.5cm*6.5cm*5cm/200