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Product: VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter, UL Certified Your 1# Choice to Know Water Quality
The VIVOSUN TDS EC PH Meter Set is a professional water quality test meter.
PH Meter Specifications:
Measure Range : 0.00 - 14.00 pH
Resolution : 0.01 pH
Accuracy : ± 0.05 pH
Calibration: Two Points Automatic Calibration Button
Power Supply: 2 x 1.5V LR44 Button Battery (keep using more than 500 hours)
Dimension:155mm*31mm*18mm
Weight:50g
3-in1 TDS EC Temperature Meter Specifications:
Lock function - makes it easy to read and record, the instrument will lock the reading result.
After the numerically result gets stable, press HOLD button then remove the meter out of test solution to read.
4 Display modes: press SHIFT button: TDS - ppm & °C, EC - µs/cm & °C, TDS - ppm & °F, EC - µs/cm & °F.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range
Conductivity: 0 - 9990 µs/cm
TDS: 0 - 9990 ppm (parts per million)
Degrees Celsius: 1.0 - 80.0°C
Fahrenheit: 32.0 - 176.0°F
Accuracy: ± 2%
Net weight: 51g
Size: 154 x 30 x 14 mm
Tips: TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.
Package Includes:
1 x PH Meter
1 x 3-in-1 TDS EC Temperature Meter
2 x Calibration Packet
2 x Carrying Case
2 x User Manual Application: Great for all home and laboratory TDS & pH testing applications including aquariums, swimming pools
PH Meter: Full measurement range of pH 0 - 14, reliable and quick readings
3-in-1 TDS Meter: Measurement Range 0-9990ppm, 0-9990µs/cm; Accuracy ± 2%, 0.1- 80.0°C, 32.0-176.0°F. Note: This meter can't test sea water.
Features: Comes with protective case; Lightweight, handheld design for portability and convenience
Included: PH meter, 3-in-1 TDS meter, 3 calibration buffers VIVOSUN Combo

Product: hand2mind White Streak Plates, Geology Tools, Streak Plates for Minerals, Mineral Test Kit for Geology, Lab Equipment, Science Supplies, School Lab Supplies, Teacher Supplies (Pack of 10) STREAK PLATES FOR MINERALS: These plates are used to identify rocks and minerals. The unglazed streak plates retain the color of the mineral.
INCLUDES SCIENCE SUPPLIES FOR THE CLASSROOM: This set of 10 streak plates measure 2 in. x 2 in. x 1/16 in.
EASY TO USE GEOLOGY TOOLS: The plates can easily identify rocks or minerals that streak very light colors.
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SCIENCE CLASSROOM SET: For any kids geology science experiments, these streak plates are perfect for classroom use. hand2mind White