Conductivity meter model DDS-11

DDS-11A conductivity meter
1.2 Instrument Features
*The instrument adopts microprocessor technology and has functions such as fully automatic calibration and power-off protection;
*The instrument is equipped with DJS-1C platinum black electrode (constant of 1.00);
*Adjustable constants and temperature compensation coefficients;
*Temperature compensation can be automatic or manual;
*The touch sensitive button adjuster replaces mechanical potentiometers and band switching switches, making it easy to operate.
*The instrument adopts dual display function (0.56 'LED displays the conductivity of the measured solution, 0.36' displays the temperature adjustment value);
*Automatic range switching, direct reading of measured values, with complete dimensional symbol prompts;
*Simple and convenient. Adopting new material PC panel, with good reliability.
Main technical performance of the instrument
2.1 Measurement Range
0.00μS/cm～19.99mS/cm
2.2 Resolution
Automatic
2.3 Basic Error of Electronic Unit
± 1.5% (FS) ± 1 word
2.4 Basic Instrument Error
± 2.0% (FS) ± 1 word
2.5 Instrument repeatability error
0.67%（FS）
2.7 Automatic temperature compensation range
0～60℃
2.8 Normal working conditions of the instrument
Environmental temperature: (5-35) ℃;
Relative humidity: not exceeding 85%
Power supply: 9V DC external power supply (positive inside and negative outside) 300mA
There is no electromagnetic interference around except for the Earth's magnetic field.
2.9 Dimensions (mm)
150 × 195 × 85 (length × width × height)

Acidity meter/desktop model PHS-3C

Instrument features: 3 1/2 digit LED digital display, with manual temperature compensation function, can be calibrated with one or two points, with international standard markings, equipped with our factory's E-201-C pH composite electrode
Technical indicators:
1. Instrument level: 0.01 level
2. Measurement range: pH: (0~14.00) pH mV: (0~± 1999) mV (automatic polarity display)
3. Minimum display unit: 0.01 pH, l mV
4. Temperature compensation range: (0~60) ℃
5. Basic error of electronic unit: pH: ± 0.01 pH mV: ± 1 mV ± 1 word
6. Basic error of the instrument: ± 0.02 pH ± 1 word
7. Input current of electronic unit: not greater than 2 × 10-12A
8. Input impedance of electronic unit: not less than l × 1012 Ω
9. Temperature compensator error: ± 0.01 pH
10. Repeatability error of electronic unit: pH: 0.01 pH mV: l mV
11. Instrument repeatability error: not greater than 0.01 pH
12. Electronic unit stability: 0.01 pH ± 1 word/3h
13. Dimensions 1 × b × h, mm: 260 × 190 × 70
14. Weight: 1.5kg
15. Normal usage conditions
a) Environmental temperature: (5-40) ℃;
b) Relative humidity: not exceeding 85%;
c) Power supply: AC (220 ± 22) V, (50 ± l) Hz;
d) There is no other magnetic field interference except for the Earth's magnetic field.