Portable Optical Do Meter

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Hangzhou Lohand Biological Technology Co.,Ltd

Zhejiang, China

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LH-D9 portable optical do meter mainly for the convenience of the user to carry to the site operation. Optical meters can be divided into the sensor and the electronic unit two parts. The sensor adopts the polarographic coated type dissolved oxygen electrode. Electronic unit for a highly integrated circuit. Optical do meter USES dot matrix LCD display, can display values of dissolved oxygen and temperature.

Parameter

DO meter
Mode	Saturation%	Oxygen (Mg/L)	Temperature
Range	0 to 199.9	0~19.99	0.0-50.0℃(32-122℉)
resolution	0.1	0.01	0.1℉ (0.1℃)
Accuracy	±1.5% FS	±1.5% FS	±0.9℉(±0.5℃)
Responding Time	1min	1min	1min
Calibration	At most 2 points
Temperature Compensation	Auto (ATC) from 32-122℉ or 0-50℃
Operating Temperature	32-122℉(0~50℃)
Battery	2*AA
Probe	Plastic electrode

In the Measurement Mode
1. Turn on the meter or return to the Measurement Mode.
2. Select % Mode and Place the probe at 1cm above the liquid until READY shows. (Get high accuracy, please keep the probe for 1min or longer .)
3. Press MODE a few times until the Calibrating is flashing on the Second Display, press HOLD/SET to enter Calibration Mode. (Calibrating stop flashing)
4. The meter will automatically recognize the standard solution and automatic calibration. During this process, the calibration value will be shown on the Second Display.
5. After Calibration, the meter automatically returns to Measurement Mode.
At most 2 points calibration: 0% and 100%, when the solution cannot be recognized, show “Err” for 2s. Then automatically returns to Measurement Mode.
NOTE: For 100% calibration, the air calibration way is a simple, quick, approximate method.
(For high accuracy, we recommend that users should regularly calibrate. In the following situation, users must recalibrate meters.)

A Portable DO meter can test the dissolved oxygen in water, which is used in many fields like aquaculture, water treatment, environmental monitoring, river regulation, and so on.