Many factors affect the pH of skin, including age, genetics, sweat, and moisture. Skin has a naturally acidic pH, ranging from pH 4 to 6. However, continued effects of alkaline cosmetic products, soaps, and detergents can easily raise the skin’s natural pH. A higher-than-normal pH can lead to adverse skin conditions, so monitoring the biological compatibility between skin and cosmetics and pharmaceuticals is essential.
TThe HI99181 uses the HI1414D/50 amplified pH electrode with glass body. This specialized electrode offers numerous features that improve surface pH testing. An integrated temperature sensor allows for temperature compensated pH measurements without the need for a separate temperature probe. The probe’s flat sensing tip provides optimal surface contact for skin measurement.An integral part of any pH electrode is the reference junction. The reference junction is a part of the electrode that allows for the flow of ions located in the reference cell into the sample being tested. It is vital that this flow occurs in order to complete an electrical circuit, which ultimately determines the pH value. Poor contact between the junction and sample will prevent completion of the circuit, resulting in readings that are erratic or constantly drifting. The flat tip of the HI1414D/50 provides optimal surface contact between the sample and the junction. The HI1414D/50 features an open junction design which utilizes a viscolene reference electrolyte that comes into direct contact with skin’s surface, providing accurate, stable readings.
Waterproof - The HI99181 is a waterproof meter rated IP67 for immersion in up to one meter of water for 30 minutes.
Automatic Calibration - One or two-point calibration is automatic to two selectable buffer sets.
Automatic Temperature Compensation – An integrated temperature sensor allows for automatic temperature compensation of pH measurements.
Multi-Level LCD Display - The split-level LCD displays both pH and temperature readings, along with indicators for reading stability, battery percentage, and calibration instructions.
On-Screen Tutorial - Clear tutorial messages and directions are available on-screen to quickly and easily guide users through setup and calibration.
Battery Error Prevention System - The meter will automatically shut off if there isn’t enough power to obtain an accurate measurement.
Battery Life Indicator - The battery percent level is displayed at start up alerting the user to the remaining battery power that is available.
pH Range -2.00 to 16.00 pH pH Resolution 0.01 pH pH Accuracy ±0.02 pH pH Calibration automatic, at one or two points with two sets of buffers (standard 4.01, 7.01,10.01 or NIST 4.01, 6.86, 9.18) Temperature Range -5.0 to 105.0°C / 23.0 to 221.0°F Temperature Resolution 0.1°C / 0.1°F Temperature Accuracy ±0.5°C (up to 60°C); ±1.0°C (outside) / ±1°F (up to 140°F); ±2.0°F (outside) Temperature Compensation automatic from -5.0 to 105.0ºC (23 to 221ºF) Electrode/Probe HI1414D/50 pre-amplified pH probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included) Battery Type/Life 1.5V (3) AAA / approximately 1200 hours of continuous use; auto-off after 8 minutes of non-use Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 152 x 58 x 30 mm (6.0 x 2.3 x 1.2”) Weight 205 g (7.2 oz.) Ordering Information HI99181 is supplied with HI1414D/50 flat tipped pH/temperature probe, HI70004 pH 4.01 buffer solution sachet, HI70007 pH 7.01 buffer solution sachet, HI700620 electrode cleaning and disinfection solution for skin residuals sachets (2), HI700621 electrode cleaning solution for skin grease and sebum sachets (2), batteries, instruction manual, and hard carrying case.
Customers also purchased: