Display is difficult to read. When switched on, all LCD segments are dark. I need to find the right viewing angle to get readings. So true? How could we know? I've been a staff metrologist for 15 years, so I'll tell you - we need at least two liquid solutions to verify accuracy. The ppm value of 1 should be on the low end of the operating range for your device. The other's ppm should be at the highest level. If both solutions appear correctly, you may have the right tool. In this step you only check the range. To test for "linearity" you need to add additional equally spaced test points in the center of the test area. Unless you test EVERY instrument against a known and/or universal standard, you have NO way of knowing if it is REALLY accurate. In this case, too, you need to repeat the test regularly - start with an interval of 3 months. Much luck.
Orthodontic Distal End Cutting Pliers For Hard And Soft Wire | Dental Surgical Instrument For Braces Removal | Teeth Extraction Kit For Dentists | 1-Year Warranty
12 Review
9 Pack 12Ml/Cc Dental Syringe W/ Curved Tip & Measurement - Disposable Graduated For Oral Care, Tonsil Stones Removing, Lab Use, Feed Small Pet
25 Review
50 Pack 3Ml Plastic Transfer Pipettes Eye Dropper Moveland Pipettes Dropper
25 Review
LifeStraw Go Water Filter Bottle: The Ultimate 2-Stage Integrated Filter Straw for Hiking Adventures
10 Review
Graduated Erlenmeyer Glass Flask Set With Narrow Mouth - 500Ml Capacity
15 Review
2-Pack 32Oz All-Purpose Heavy Duty Plastic Spray Bottles - Leak Proof, Adjustable Nozzle For Cleaning, Planting & Pet Care - Green
22 Review
Valchoose LDPE Economy Wash Bottle, Narrow Mouth Squeeze Bottle Medical Lab Plastic, Safety Squeeze Bottle No Spill, Bend Mouth Watering Cans (500Ml / 16Oz / 1 Bottle)
14 Review
ULAB Scientific 1000Ml Borosilicate Glass Beaker With Printed Graduation - Durable And Accurate For Lab Use (UBG1005)
12 Review