pH Sensors

ORP (Redox) Sensors

Measuring Range

-2 to 14 pH

-1500 to +1500 mV

Sensitivity

±0.01 pH

±0.5 mV

Stability

0.03 pH per 24 hours,

non-cumulative

2 mV per 24 hours, non-cumulative

Operating Temperature

Digital Sensor: -5 to 70ºC (23 to 158ºF)

Analog Sensor with Digital Gateway: - 5 to 105ºC (23 to 221ºF)

Immersion Sensor: 0 to 50ºC (32 to 122ºF)

Digital Sensor: -5 to 70ºC (23 to 158ºF)

Analog Sensor with Digital Gateway: - 5 to 105ºC (23 to 221ºF)

Immersion Sensor: 0 to 50ºC (32 to 122ºF)

Flow Rate

3 m (10 ft.) per second, maximum

3 m (10 ft.) per second, maximum

Sensor Pressure/

Temperature Limits

Digital: 6.9 bar at 70ºC

(100 psi at 158ºF)

Analog: 6.9 bar at 105ºC

(100 psi at 221ºF)

Digital: 6.9 bar at 70ºC

(100 psi at 158ºF)

Analog: 6.9 bar at 105ºC

(100 psi at 221ºF)

Built-in Temperature Element

NTC 300 ohm thermistor for automatic temperature compensation and analyzer temperature readout

NTC 300 ohm thermistor for

analyzer temperature readout only— no automatic temperature

compensation necessary for ORP

measurement

Transmission Distance

100 m (328 ft.), maximum

1000 m (3280 ft.), maximum when

used with a termination box

100 m (328 ft.), maximum

1000 m (3280 ft.), maximum when

used with a termination box

Sensor Cable (integral)

4 conductor cable with one shield and polyurethane jacket; rated to 105ºC (221ºF); 10 m (33 ft.) standard length

4 conductor cable with one shield

and polyurethane jacket; rated to

105ºC (221ºF); 10 m (33 ft.) standard

length

Wetted Materials

PEEK® or Ryton® (PVDF), salt bridge of matching material with Kynar ® junction, glass process electrode,titanium ground electrode, and Viton O-ring seals (Please contact Hach Technical Support for available wetted O-ring materials.)

PEEK®or Ryton® (PVDF), salt bridge

of matching material with Kynar ®

junction, glass and platinum (or

plastic and gold) process electrode,

titanium ground electrode, and Viton®

O-ring seals