Yokogawa FU24 All-in-One pH/ORP Sensor - Manual (Page 8)

IM 12B6J3-03E-E
8
2. GENERAL SPECIFICATIONS
2.1 Measuring elements
: pH glass electrode
: Silver chloride reference
: Solid platinum electrode
: Pt1000 temperature sensor.
2.2 Wetted parts
Sensor body
: PPS 40GF (Ryton™ with glass filling)
Earthing pin : Solid Platinum
Measuring sensor : G-glass
LE glass tube : AR-glass
O-ring : Viton
Reference junction : Porous PTFE
2.3 Functional specifications (at 25°C)
Isothermal point
: pH 7
Reference system : Ag/AgCl with saturated KCI
Glass impedance
- Dome shape : 200 M Ω nominal
- Flat Surface : 700 M Ω nominal
Junction resistance : 1.0 to 15 k Ω
Liquid outlet : non-flow double junction
Temperature element : Pt1000 to IEC 751
Asymmetry potential : 8 ± 15 mV
Slope : > 96 % (of theoretical value)
Note: The temperature sensor included in the FU24 is designed for cell compensation
and for indication. It is NOT designed for process temperature control.
2.4 Dynamic specifications
Response time pH
: t90 < 15 sec. (for 7 to 4 pH step)
Response time temperature
- Dome shape : t90 < 1 min. (for 10 °C step)
- Flat surface : t90 < 4 min. (for 10 °C step)
Stabilization time pH : < 2 min. (for 0.02 pH unit during 10 sec.)
2.5 Operating range
pH
: 0 to 14
ORP : -1500 to 1500 mV
Temperature
- Dome shape : -10 to 105 ºC (14 to 221 ºF)
- Flat Surface : 15 to 105 ºC (59 to 221 ºF)
Pressure : 0 to 10 bar (0 to 145 PSIG) at 25 ºC
0 to 5 bar (0 to 73 PSIG) at 105 ºC
Conductivity : > 10 µS/cm
Note: The pH operating range at room temperature is 0-14 pH, but at high temperatures or
range outside 2-12 pH the lifetime will be seriously shortened.
Note: Sensor is suitable for pure water applications