Portable PH Meter

We are offering portable ph meter, temperature meter, mv meter etc.
the meter are used to measure acidity and alkalinity of liquids.
microprocessor-based:
sts-321 has built-in high performance cpu, it can work about 200 hours continuously with 9 volt battery.
two points push-button calibration:
the meter with two points calibration function, it will prompt ph calibration solution when you calibrate the meter, you need only immerse the ph electrode into standard solution and press enter key, then the meter will be calibrated automatically.
auto-buffer recognition:
in calibration, the meter will display error if you use ph standard solution by mistake or not by the calibration prompt.
Viewing of electrode slope:
after calibration, the meter will indicate electrode slope, you can judge by the indicator to replace electrode or not.
automatic temperature compensation:
sts-3 series with temperature sensor, you can view temperature value on the lcd, the meter with automatic temperature compensation for accurate reading under changing conditions.
hold function:
the meter with hold function, press meashold key, the meter momentarily freezes reading.
Message indicator:
sts-3 series with operational message indicator. When you need setup or measurement, the message indicator will help you what you can do and how do it. You can set parameter or select functions under it's guide.
Save data:
the meter can save 50 data sets, press save key, and the meter will store current measured value, serial number, date, time and other information.
Output data:
the data can be sent to computer through usb communication interface, you can print out test report via software.
model sts-321
ph range -2.00~16.00ph
ph accuracy ±0.01ph
mv range 0~±1999mv
mv accuracy ±1mv
orp range 0~±1999mv
orp accuracy ±2mv
temperature range 0~100.0 or 32~212of
temperature accuracy ±1.0, ±1.8of
temperature compensation 0~100.0, 32~212of
calibration points 2 points
ph standard solutions nist, ph4.006.869.18 or usa, ph4.017.0010.01
memory 50
output usb
power requirement 9v800ma battery
display 4.3 inch lcd
dimension 185(l)mm×88(w)mm×32(h)mm
weight 300g