Instructional manual- HBPH-MK2
– UK-004
Page 2
General Information
This manual covers HBPH sensor for pH measurement in brine.
The HBPH sensor features differential design for long lifetime, user serviceability and more accurate readings. In
typical installations these probes will last for years whereas the more common combination probe lasts only
months.
The sensor is a 2-wire device. It incorporates an encapsulated transmitter that outputs a 4-20 mA analog signal. It
is designed to connect directly to a PLC.
The output from a two-wire transmitter type is non-isolated and un-calibrated. The system must provide 24 VDC,
with the “low” input isolated from earth ground, and a means of calibrating for offset and span.
NOTE
: Do not discard the protective cap that came with the sensor. If the sensor is removed from the process for
a longer period, thoroughly clean the sensor, put a piece of cotton ball with a few drops of water into the
protective cap and place it on the sensor. This keeps the junction from drying out which causes slow response
when the sensor is put back into operation or causes permanent damage to the sensor.
Sensors should not be
left in dry lines or empty vessels for longer periods of time.
Do not store the sensor in a dry or humid location. When storing, check the protective cap regularly to make sure
the cotton ball remains moist. Improper storage of sensors voids the warranty.
Specifications
HBPH-2W-9-MKLT
Measurement Range
0 to 14.00 pH
Wetted Materials
Ryton®(PPS), glass, ceramic, titanium, Viton
Ambient Temperature -15
…+50°C
Liquid Temperature
-15
…+95°C
Stability
0.03 pH/day
Resolution
0.01 pH
Sensitivity
< 0.005 pH
Output Span
1.14 mA/pH
Output Offset
12±1.0 mA @ pH 7
Mounting
1” NPT
Max. Flow Rate
3,0 m/sec (10 ft/sec)
Maximum Load
450 Ω
Temperature Limits
6,9 barg (100 psig) @ 65 °C, 2,75 barg (40 psig) @ 95°C
Power Supply Limit
24±4 VDC
Cable
4.6 m (15 ft)