[. . . ] Ascorbic Acid Method Easier to use and more accurate than chemical test kits Adaptation of Standard Method Ascorbic Acid Accuracy ±5% of reading ±10 ppb 1 ppb resolution (200 points) Large, easy to read digits Auto shut-off Dedicated to a single parameter Designed to work with HANNA's powder reagents Uses 10 mL glass cuvettes Small Size, Big Convenience Weighing a mere 64 g (2. 25 oz. ), the Checker®HC easily fits into the palm of your hand or pocket Use for quick and accurate on the spot analysis Single button operation: Zero and Measure Operated by a single AAA battery SHOWN ACTUAL SIZE ACCURATE AND AFFORDABLE PHOSPHORUS ULR MEASUREMENT Phosphorous (as phosphate) can be introduced to aquaria through feed, decaying plant and animal waste, and even tap water, so it can quickly become so abundant that it becomes a nuisance. [. . . ] The contoured style of this Checker®HC fits in your palm and pocket perfectly and the large LCD is easy to read. The auto shut-off feature assures the battery life will not be drained if you forget to turn it off. Last, Place the vial into the HI 736 Checker®HC, press the button and read the results. It's that easy. WE DESIGN, MANUFACTURE, SUPPLY AND SUPPORT ALL OF OUR PRODUCTS. THAT'S 360° VALUE Over the past 30 years, HANNA has never failed to design fresh and innovative products. We are excited to introduce such high accuracy and ease of use in a small, modern design that fits in the palm of your hand. HANNA is the largest family-owned manufacturer of analytical instrumentation in the world. The new series of Checker®HC's are manufactured in our European state-of-the-art ISO 9001:2000 production facility. [. . . ] it's that easy! HIGH ACCURACY, AFFORDABLE PRICE SPECIFICATIONS Range Resolution Accuracy Light Source Light Detector Environment Battery Type Auto-off Dimensions Weight Method HI 736 (Phosphorus ULR) 0 to 200 ppb 1 ppb ±5% of reading ±10 ppb @ 25ºC LED @ 525 nm Silicon photocell 0 to 50°C (32 to 122°F); RH max 95% non-condensing (1) 1. 5V AAA After 3 minutes of non-use 81. 5 x 61 x 37. 5 mm (3. 2 x 2. 4 x 1. 5") 64 g (2. 25 oz. ) Adaptation of Standard Method Ascorbic Acid. P/L CHECKERHC_HI736_INC 1. 0 PRINTED IN USA ORDERING INFORMATION HI 736 Checker®HC is supplied with (2) sample cuvettes with caps, (6) powder reagents for phosphorus, (1) 1. 5V AAA battery and instructions. ACCESSORIES HI 731318 HI 731321 HI 731225 (4) Cuvette cleaning cloth (4) Glass cuvettes (4) Caps for cuvettes SHOWN ACTUAL SIZE REAGENTS AND STANDARDS HI 736-25 HI 736-11 Reagents for 25 tests (phosphorus) Calibration standard kit (0 and 100 ppb phosphorus) HI 93703-50 Cuvette cleaning solution, 230 mL [. . . ]