(1) Measurement range: pH: 0-14.00pH;

Temperature: 0-60 ℃.

(2) Basic error: pH: ± 0.05pH;

Temperature: ± 0.5 ℃.

(3) Automatic temperature compensation range: 0-60 ℃.

(4) Temperature compensation error: ± 0.03pH ± 1 word.

(5) Stability: ± 0.02pH/24h.

(6) Input impedance: ≥ 1 × 1012 Ω.

(7) Input current: ≤ 1 × 10-12A.

(8) Water sample pressure: ≥ 0.6MPa.

(9) Current isolation output: 0-10mA (load resistance<1.5K Ω); 4-20mA (load resistance<750 Ω).

(10) Data storage capacity: 55 hours (1 hour/10 seconds), 14 days (1 hour/1 minute),

68 days (1 hour/5 minutes), 412 days (1 hour/30 minutes).

(11) Data retention time for continuous power failure: 6 years.

(12) Network output: Balanced differential transmission. Distance of 1.2Km; with the addition of a relay, the distance is 10Km long.

(13) Alarm relay normally open contacts: 3A 240VAC, 6A 28VDC or 120VAC.

(14) Power supply: 85-265VAC 50 ± 1Hz.

(15) Power consumption: 10W.

(16) Dimensions of electronic unit: 135 (length) x 135 (width) x 235 (depth) mm;

Installation hole size: 138 × 138mm, with a frame of 144 × 144mm.

(17) Electronic unit mass: 2.5Kg.

(18) Flow type inlet and outlet pipe connection: hard or soft pipe, with an outer diameter of Ø 10 or Ø 6, Ø 8, Ø 12, and Ø 14.

(19) Normal working conditions:

a) Environmental temperature: 0-60 ℃;

b) Relative humidity: ≤ 90%;

c) No vibration, no corrosive gases, no direct sunlight. No magnetic or electric field interference.