MULTI-PARAMETER. COMPACT. POCKETABLE. WATERPROOF.
The Milwaukee MW804 MAX Waterproof 4-in-1 pH/EC/TDS/Temp Tester is designed as an all-in-one solution for hobby growers.
The MW804 is a pocket pH (0 to 14.00), EC (0 to 20.00), TDS (0 to 10.00ppt) and temperature (0 to 50°C) tester. The MW804 has a large digital display that shows the pH, EC or TDS with the temperature simultaneously underneath.
Accurate to ±0.05 pH, EC/TDS to 2% full scale and ±0.5°C / ±1°F for temperature.
With automatic calibration and 5 stored calibration points, the tester can be quickly and easily calibrated to higher accuracy compared to manual calibration.
The MW804 is ideal for quick and accurate measurements in plant nutrient solutions.
DESIGN FEATURES
- Quick and easy to read results with large digital dual LCD readout.
- Extreme accuracy to ±0.05 pH, EC / TDS 2% full scale and temperature ±0.5 C / ±1 F.
- Range 0.00 - 14.00 pH, EC 20.00 mS/cm, TDS 0 - 10.00 ppt, Temperature: 0.0 to 50.0 C / 32.0 to 122.0 F.
- Lightweight and portable at only 3.5 ounces.
- Simple measurement: insert the probe into the sample, stir gently, wait until the stability indicator indicates a stable reading, then freeze the reading.
- Simple push-button, automatic one- or two-point calibration with 5 stored calibration points.
- Gel-filled, double junction pH electrode for low maintenance and high performance.
- Automatic shut-off and low power consumption for approximately 100 hours of continuous use (batteries included).
USE AND MAINTENANCE
The MW804 MAX tester contains both a pH and an EC electrode. Both require maintenance.
pH
All pH sensors have a limited lifespan and the response time gets longer as they age. Properly maintaining your pH pin tester will help you get fast, accurate results for longer. It is necessary to clean and condition the pH electrode before use!
TOP 4 TIPS FROM MILWAUKEE
- Always store with the cap full of buffer or storage liquid not water.
- Clean your tester regularly by immersion in cleaning solution.
- Calibrate after cleaning and/or storing before testing to correct for changes in the pH and EC sensor.
- Gently stir the tester into the sample for faster results.
EC
EC sensors are more robust, but can still be affected by residue buildup.
EC electrodes may start to release nutrients over time. Rinse the probe with fresh tap water after each use to prevent build-up.
CONVERTING EC TO TDS
The Milwaukee EC pen, like all conductivity meters, provides a measurement of electrically charged ions in a solution and is an absolute measurement of conductivity.
EC is often converted to TDS in parts per million (ppm). There are several scales, such as the 500 scale, the 650 scale, and the 700 scale. However, the true PPM can only be determined by chemical analysis.
Your mS/cm reading can be converted to TDS (ppm) by approximation:
2,000 µS/cm = 2.0 mS/cm = 1000 ppm on .50 factor scale
2,000 µS/cm = 2.0 mS/cm = 1400 ppm on 442 scale or .70 factor scale
Specifications
- pH
- Range: 0.00 to 14.00 pH;
- Resolution: 0.01 ph;
- Accuracy: 0.01 pH;
- Calibration: 1 or 2 points (pH 4.01, pH 7.01 and pH 10.01);
- EC
- Range: 0.00 to 20.00 mS/cm;
- Resolution: 0.01 mS/cm;
- Accuracy: 2%;
- Calibration: 1 point (1.413 or 12.88 mS/cm).
- TDS
- Range: 0.00 to 10.00 ppt;
- Resolution: 0.01 ppt;
- Accuracy: 2%;
- Calibration: 1 point (1382 ppm and 6.44 ppt);
- Factor: 0.45 to 1.00.
- Temperature
- Range: 0.0 to 50.0 °C / 32.0 to 1220 °F;
- Resolution: 0.1 °C / °F;
- Accuracy: 0.5 °C / 1 °F;
- Calibration: 1 or 2 points (pH 4.01, pH 7.01 and pH 10.01).
- Temperature compensation: Automatic ß=0.0 to 2.4%/°C;
- Measuring electrode: Mi60P (Replaceable);
- Ambient conditions: 0 to 50°C / 100% RH;
- Batteries: 4x 1.5V LR44;
- Battery life: 100 hours;
- Auto-off: after 8 minutes of non-use;
- Dimensions: 200 × Ø38 mm;
- Weight: 100 grams.
Links
Milwaukee pH-adjuster
