Hanna Instruments HI 755 Checker HC Handheld Colorimeter, For Alkalinity (1 cuvette, 1 bottle of liquid reagent and 1 syringe - Included)
The Hanna Instruments HI 755 Checker HC Handheld Colorimeter measures the alkalinity of saltwater aquariums, has an LCD screen, and an accuracy of + or - 5 ppm + or - 5%. This portable colorimeter measures the alkalinity of saltwater aquariums. It includes two cuvettes with caps, liquid reagent for alkalinity, and a syringe with tip for testing water samples. The reagent is good for approximately 25 tests. The LCD screen displays test results with an accuracy of + or - 5 ppm + or - 5% of reading and resolution of 1 ppm. It has single-button operation to zero the display and begin a test for ease of use. The colorimeter's compact size provides ease of storage and carrying. The unit operates on a single AAA battery, and turns off automatically after 10 minutes of non-use to conserve battery life.
| Method | Colorimetric method |
| Range | 0 to 300 ppm (mg/L) |
| Resolution | 1 ppm (mg/L) |
| Accuracy | + or - 5 ppm (mg/L) + or - 5% (at 25 degrees C/77 degrees F) |
| Light source | LED @ 610 nm |
| Light detector | silicon photocell |
| Working environment | 0 to 50 degrees C (32 to 122 degrees F); RH max 95% non-condensing |
| Battery | 1 AAA |
| Weight | 64 g/2.25 oz. |
| Dimensions | 81.5 x 61 x 37.5 mm/3.2 x 2.4 x 1.5 inches (H x W x D) |
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) standard 9001.
