Specifications – Hach-Lange pHD sc User Manual
Page 8
2
Specifications
Temperature
Compensation
Automatic from –10 to 105 °C
(14.0 to 221 °F) with selection
for NTC 300 ohm thermistor, Pt
1000 ohm RTD, or Pt 100 ohm
RTD temperature element, or
manually fixed at a user-entered
temperature; additional
selectable temperature
correction factors (ammonia,
morpholine, or user-defined
pH/°C linear slope) available for
pure water automatic
compensation from 0.0 to 50 °C
(32 to 122 °F)
Automatic from –10 to 105 °C
(14.0 to 221 °F) with selection
for NTC 300 ohm thermistor, Pt
1000 ohm RTD, or Pt 100 ohm
RTD temperature element, or
manually fixed at a user-entered
temperature; additional
selectable temperature
correction factors (ammonia,
morpholine, or user-defined
pH/°C linear slope) available for
pure water automatic
compensation from 0.0 to 50 °C
(32 to 122 °F)
N/A
Measurement
Accuracy
±0.02 pH
±0.02 pH
±5 mV
Temperature Accuracy
±0.5 °C (0.9 °F)
±0.5 °C (0.9 °F)
±0.5 °C (0.9 °F)
Repeatability
±0.05 pH
±0.05 pH
±2mV
Sensitivity
±0.01 pH
±0.01 pH
±0.5 mV
Calibration Methods
Two point automatic, one point
automatic, two point manual,
one point manual.
Two point automatic, one point
automatic, two point manual,
one point manual.
one point manual
Maximum Probe
Immersion Depth/
Pressure
Submersible to 107 m (350
ft)/1050 kPa (150 psi)
Immersion only
Submersible to 107 m (350
ft)/1050 kPa (150 psi)
Sensor Interface
Modbus
Modbus
Modbus
Probe Cable Length
6 m (20 ft) + 7.7 m (25 ft)
interconnect cable extension for
analog sensor with digital
gateway
10 m (31 ft) for sensor with
integral digital electronics
6 m (20 ft) + 7.7 m (25 ft)
interconnect cable extension for
analog sensor with digital
gateway
10 m (31 ft) for sensor with
integral digital electronics
6 m (20 ft) + 7.7 m (25 ft)
interconnect cable extension
for analog sensor with digital
gateway
10 m (31 ft) for sensor with
integral digital electronics
Probe Weight
316 g (11 oz)
870 g (31 oz)
316 g (11 oz)
Probe Dimensions
See
Figure 2 on page 5
through
Figure 3 on page 5
.
See
Figure 4 on page 5
.
See
Figure 2 on page 5
through
Figure 3 on page 5
.
1
Most pH applications are in the 2.5 to 12.5 pH range. The pHD™ Differential pH sensor with the wide-range glass process
electrode performs exceptionally well in this range. Some industrial applications require accurate measurement and control
below 2 or above 12 pH. In these special cases, please contact the manufacturer for further details.
2
For best ORP measuring results in solutions containing zinc, cyanide, cadmium or nickel, the manufacturer recommends using
the pHD™ ORP sensor equipped with a gold electrode.
3
PEEK
®
is a registered trademark of ICI Americas, Inc.
4
Ryton
®
is a registered trademark of Phillips 66 Co.
5
Kynar
®
is a registered trademark of Pennwalt Corp.
6
Viton
®
is a registered trademark of E.I. DuPont de Nemours + Co.
Table 2 Digital Gateway Specifications
Weight
145 g (5 oz)
Dimensions
17.5 x 3.4 cm (7 x 1
3
/
8
in.)
Operating Temperature
–20 to 60 °C (–4 to 140°F)
Table 1 Differential pH and ORP Sensor Specifications (continued)
Specification Category
pH Sensors
1
Stainless Steel pH Sensor
ORP Sensors
2