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มิเตอร์วัดค่าความสะอาดของน้ำ, TDS meter model TDS3
1,100.- ผมอนันต์ครับ Tel.0868910596
เป็นTDS meter ที่ราคาย่อมเยามากครับ และใช้งานได้ดีพอควร
TDS-3 Handheld TDS Meter With Carrying Case
aquaculture, hydroponics, and colloidal silver. Perfect for both
consumer or commercial use. Carry one in your pocket or toolbox at
all times!
Features:
- Ideal for commercial use. Includes a carrying case with belt clip.
- Highly efficient and accurate due to its advanced microprocessor technology.
- Hold Function: saves measurements for convenient reading and recording.
- Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
- Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image.
- Built-in digital thermometer
- Display: large and easy-to-read LCD screen.
- Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
- Also available in "x10" mode: reads in increments only of 10 ppm (0-9990 ppm).
- Click here for a photo of the meter with its case.
- Need help deciding which meter is right for you? View ourTDS/EC Meter Selection Guide.
Specifications.
TDS Range: 0 - 9990 ppm (mg/L)
Temp. Range: 0 - 80 degrees Celsius
Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a 'x10' icon)
Temperature Resolution: 0.1 degree Celsius (Celsius only)
Accuracy: +/- 2%
EC-to-TDS Conversion Factor: NaCl (avg. 0.5)
ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50
degrees Celsius (33 to 122 degrees Fahrenheit)
Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
Battery life: 1000 hours of usage
Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)
Weight with case: 76.5g (2.7 oz)
Weight without case: 56.7g (2 oz)
Hydroponics
สำหรับการปลูกผักไร้ดิน หรือผักประเภท Hydroponic แล้วการวัดค่า TDS
หรือสารอาหารที่ให้กับพืชเป็นสิ่งที่สำคัญยิ่งครับ
ซึ่งผมมีตารางที่พืชแต่ละชนิดควรจะได้รับว่่าควรจะอยู่ในความเข้มข้นเท่าไรจึงจะ
เหมาะสม และถ้าหากการวัดค่าได้น้อยเกินไปท่านก็ควรจะเติมลงไปให้เหมาะสม
A TDS tester is critical when growing plants by hydroponics.
Hydroponic gardeners all over the world monitor nutrient levels in
roughly the same way—by measuring total dissolved solids in the
growing solution — but they have different preferences for the format
of their test results. Growers in the U.S. often examine a simple ratio
known as parts per million PPM). High concentrations of salts increase
the solution’s electrical conductivity (EC).
Total dissolved solids readings help to indicate the density of solution
which can help to determine when it’s time to add nutrients.
Temperature can affect TDS/EC meter readings. It is important that you
read your hydroponics nutrient packaging carefully to make sure
feeding indications correspond with your meter.
Hydroponics TDS/EC Meter (aka nutrient or "ppm" meter):
COM-100
Hydroponics pH Meter:
For great results, consult the ppm table below for assorted
fruits, veggies, herbs and tropicals. Keeping your nutrient
solution at the right concentration is important for maintaining
optimum growth! (TDS level ranges below are listed in ppm.)
ตารางดังกล่าวเป็นดังนี้ครับ
| Species | TDS Range | Species | TDS Range | |
| African Violets | 840-1050 | Ficus | 1120-1680 | |
| Artichoke | 560-1260 | Garlic | 980-1260 | |
| Asparagus | 980-1260 | Gladiolus | 1400-1680 | |
| Aster | 1260-1680 | Impatiens | 1260-1400 | |
| Bananas | 1260-1540 | Lavender | 700-980 | |
| Basil | 700-1120 | Leek | 980-1260 | |
| Beans | 1400-2800 | Lettuce | 560-840 | |
| Blueberries | 1260-1400 | Mint | 1400-1680 | |
| Broccoli | 1960-2450 | Okra | 1400-1680 | |
| Cabbage | 1750-2100 | Palms | 1120-1400 | |
| Carnation | 1260-2450 | Parsley | 560-1260 | |
| Carrots | 1120-1400 | Peas | 980-1260 | |
| Cauliflower | 1050-1400 | Rosemary | 700-1120 | |
| Celery | 1260-1680 | Sage | 700-1120 | |
| Chives | 1260-1540 | Spinach | 1260-1610 | |
| Cucumber | 1190-1750 | Strawberries | 1260-1540 | |
| Eggplant | 1750-2450 | Thyme | 560-1120 | |
| Endive | 1400-1680 | Tomatoes | 1400-3500 | |
| Ferns | 1120-1400 | Zucchini | 1260-1680 |