HI97739C เป็นโฟโตมิเตอร์แบบพกพาขั้นสูงสำหรับการตรวจวัดฟลูออไรด์ในน้ำในระดับสูง มิเตอร์นี้มีระบบออพติคอลที่เหนือกว่าซึ่งใช้ตัวตรวจจับอ้างอิงและตัวกรองสัญญาณรบกวนย่านความถี่แคบเพื่อการวัดที่รวดเร็วและทำซ้ำได้
- ไม่ต้องอุ่นเครื่องก่อนทำการวัด
- โหมดการสอนสำหรับคำแนะนำทีละขั้นตอน
- ตรวจสอบ CAL เพื่อตรวจสอบประสิทธิภาพของมิเตอร์
HI97739C is an advanced portable photometer for the measurement of fluoride in water. This meter offers a superior optical system that utilizes a reference detector and narrow band interference filters for extremely fast and repeatable measurements.
- No warm up time before taking a measurement
- Tutorial mode for step-by-step instructions
- CAL Check to verify meter performance
Fluoride is best known for preventing tooth decay. Water authorities often add fluoride to drinking water to maintain approximately a 1.0 mg/L (ppm) concentration. Fluoride can be found naturally in groundwater, particularly if a reservoir is in close proximity to seawater. While fluoride does help prevent tooth decay, too little can be ineffective while too much can cause staining of teeth.
The HI97739 uses an adaptation of the SPADNS method to measure fluoride concentrations up to 20.0 mg/L (ppm). When the colored reagent is added to samples containing fluoride, the fluoride in the sample will form a colorless complex; the greater the concentration, the clearer the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For fluoride determination, a narrow band interference filter at 575 nm allows only green-yellow light to be emitted and passed through the sample cuvette. The sample will produce a blue color, which its’ intensity is proportional to the concentration of fluoride. The absorbance of the yellow light increases as the intensity of blue increases resulting in less transmittance of light hitting the silicon photodector.
Manual : Download
Specification
SKU | HI97739C |
Product Name | Fluoride High-Range Portable Photometer with CAL Check |
Quote Required | Yes |
Fluoride Range | 0.0 to 20.0 mg/L (as F–) |
Fluoride Resolution | 0.1 mg/L |
Fluoride Accuracy | ±0.5 mg/L ±3% of reading |
Fluoride Method | Adaptation of Standard Methods for the Examination of Water and Wastewater, 23rd Edition, SPADNS Method |
Photometer/Colorimeter Light Source | Light Emitting Diode with 575 nm bandpass filter |
Photometer/Colorimeter Light Detector | Silicon photocell |
Bandpass Filter Bandwidth | 8 nm |
Bandpass Filter Wavelength Accuracy | ±1.0 nm |
Cuvette Type | Round 24.6 mm diameter (22 mm inside) |
GLP | Yes |
Display | 128 x 64 pixel B/W LCD with backlight |
Data Points Stored | Last 50 readings |
Battery Type/Life | 1.5 V AA Alkaline (3 pcs.) / > 800 measurements (without backlight) |
Automatic Shut-Off | After 15 minutes of inactivity (30 minutes before a READ measurement) |
Environment | 0 to 50 °C (32 to 122 °F); 0 to 100% RH |
Weight | 380 g (13.4 oz.) |
Dimensions | 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″) |
Ordering Information | HI97739C is supplied with CAL-Check standards, cuvettes (2), caps (2), plastic inserts for cuvette, (2), scissors, cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and instrument quality certificate packaged in a rugged, thermoformed, carrying case. |