Technology For Solutions
Data Sheet 5500/302
Supersedes 5500/201
Model 5500-series Clark Technology
Membrane Dissolved Oxygen Sensor
„ Replaceable Membrane
Cartridge.
Model 5500-series dissolved
oxygen sensors feature a
replaceable cartridge, simplifying
the delicate and time-consuming
task of installing a new
membrane. Each cartridge
assembly includes a pre-installed,
semi-permeable membrane,
electrolyte, and electrodes.
„ Rugged, Foul-resistant
Membrane.
An extremely durable 50 micron
thick hydrophobic membrane
ensures that the D.O. sensor
resists fouling and withstands the
harsh environments found in
wastewater treatment plants.
„ Automatic Self-cleaning
Accessories.
Self-contained air blast cleaning
systems, complete with air
compressor, are offered for use
with GLI analyzers to
automatically clean the sensor
membrane. A separate washer
head air blast assembly is also
available. It requires an external
source to provide pressurized air.
„ Clark Cell Technology.
GLI Model 5500-series dissolved
oxygen sensors use polarographic
Clark Cell technology that
includes a three-electrode system:
gold cathode, silver anode, and
silver reference electrodes. The
potentiostatic design operates by
polarizing the silver reference
electrode with a constant voltage
potential. This third electrode
provides a more constant potential
than the silver anode (used as
reference in conventional twoelectrode systems) because it
does not conduct current flow
necessary to measure the
dissolved oxygen. The reference
electrode gives the GLI sensor
greater accuracy and stability due
to better long-term polarization
stability as the silver anode and
electrolyte age.
„ Versatile Mounting Hardware.
The handrail and flotation
hardware assemblies feature a
unique stainless steel swivel/
pivot/pipe clamp assembly,
enabling easy sensor positioning
and removal from the process.
The flotation hardware has a ball
float assembly that continually
bobs up and down to gently scrub
the sensor membrane. The
submersion hardware enables
submerging the sensor to a
desired depth in the basin. All
hardware includes a NEMA 4X
junction box with quick-disconnect
receptacle for the metal plug on
the sensor cable (termination
option “A”). Flow-through union
hardware is also offered to quickly
and easily remove and replace a
union-mount style sensor into a
process pipe.
„ Complete Encapsulation.
Fully-encapsulated
construction protects the
sensor’s built-in electronics
from moisture and humidity
problems, extending the
working life of the sensor.
„ Advanced Diagnostics.
When used with GLI analyzers,
the sensor will provide an alarm
signal for a punctured membrane,
or depleted or contaminated
electrolyte.
DISSOLVED OXYGEN
(shown with optional washer head air blast cleaning assembly)
Specifications
®
®
®
Wetted Materials............................... Noryl and 316 stainless steel body, PVC mounting adapter, Viton O-rings, Teflon membrane, Noryl
®
and Ryton cartridge assembly, and nylon cable grip/strain relief
®
Electrode Materials........................... Gold cathode, silver anode, and silver reference
Temperature Range ......................... 32-122°F (0-50°C)
Temperature Compensator .............. NTC 30K ohm thermistor
Minimum Flow Rate.......................... 0.016 feet (0.5 centimeters) per second
Maximum Pressure........................... 145 psi (10 bar)
Measuring Range ............................. 0.0-40.00 ppm
Sensitivity ......................................... ± 0.05% of span
Repeatability..................................... ± 0.5% of span
Response Time (20°C) ..................... 130 seconds to 90% of value upon step change
Membrane Thickness ....................... 2 mil (50 microns)
Sensor Cable (integral)..................... 15 ft. (4.6 m) long cable, terminated with an MS-type quick-disconnect plug (metal or plastic)
Measuring Principle .......................... Three-electrode polarographic Clark Cell technology
Electrical Certification ....................... CSA and FM approved for use with GLI Model D53 in Class I, Div. 2 (Groups A - D) hazardous areas
Noryl® is a registered trademark of General Electric Co.
Viton® and Teflon® are registered trademarks of E.I. Du Pont de Nemours + Co.
Ryton® is a registered trademark of Phillips 66 Co.
Ordering Information
Membrane D.O. Sensors
MODEL NUMBER (Notes 1 and 2)
55 GLI membrane D.O. sensor with polarographic Clark Cell and integral 15 foot (4.6 m) long cable.
MOUNTING STYLE
4 Submersion (for use with optional GLI mounting hardware)
5 Union-mount (flanged for use with a special GLI 2-inch “Y” tee)
RESERVED CATEGORIES
TERMINATION FOR INTEGRAL SENSOR CABLE
A Metal M.S. style plug (only mates with GLI hardware junction box receptacle)
C Plastic M.S. style plug (only mates with GLI D53 analyzer receptacle)
55
0D0
Product Number
Choose one from each category.
NOTES: 1. Each sensor includes a replaceable cartridge (with a factory-installed, semi-permeable membrane),
protector, and 12 disposable calibration bags for highly accurate “Saturation Method” air calibration.
2. To order a sensor with a non-standard cable length, please specify the sensor model number and add the
suffix “0A” followed by the required length of cable in whole feet. Example: 5540D0A0A25 for sensor with
25 foot cable.
Sensor Mounting Hardware
„ Handrail Mounting Hardware (non-float type)
MH276H00F
Hardware consists of a 1-1/2 inch diameter by 7.5 foot (2.3
m) long PVC pipe, a unique swivel/ pivot/pipe clamp
assembly, and a surface-mount NEMA 4X junction box with
quick-disconnect receptacle for sensor with metal plug on
cable end.
„ Flotation Mounting Hardware MH276J00F
This hardware is the same as MH276H00F listed above
but also includes a ball float assembly, and a 45°-angled
PVC coupling to connect the float assembly to the pipe.
„ Flotation Extension Pipe 76A9902
This pipe is only for use with the MH276J00F flotation
mounting hardware. It extends the membrane end of the
sensor to 1 foot (0.3 m) below the ball float for applications
where greater submersion depth is desired.
Ordering Information (continued)
Sensor Mounting Hardware (continued)
„ Submersion Mounting Hardware MH276R00F
Hardware consists of a 1-1/2 inch diameter by 5 foot (1.5
m) long PVC pipe, and a surface-mount NEMA 4X junction
box with quick-disconnect receptacle for sensor with metal
plug on cable end.
„ Flow-through Union Hardware MH378W4PZ
This hardware is only for use with a union mount style
sensor. It consists of a PVC 2-inch “Y” tee with socket-weld
connections, and a 2-inch union. (If required, a NEMA 4X
junction box 76A4000-001 can be ordered.)
„ Junction Box-to-Instrument Interconnect Cable 1W1100
This 6-conductor (plus shield) cable is required for use with
all GLI membrane D.O. sensor mounting hardware to
connect the hardware junction box to the measuring
instrument. Specify cable length in whole feet.
„ NEMA 4X Junction Box 76A4000-001
This waterproof, surface mount junction box is for use with
MH378W4PZ flow-through union hardware. Its quickdisconnect receptacle mates with the sensor cable
terminated with a metal plug (termination option “A”).
Sensor Spare Parts/Accessories
„ Self-contained Air Blast Cleaning Systems:
„ Replacement Cartridge 5500A1020-001
All cartridges include a pre-installed, semi-permeable
membrane, electrolyte, electrodes, and O-ring.
„ Replacement O-ring 5H0675 for Cartridge
For all GLI membrane cartridges, this O-ring provides a
seal between the sensor body and the cartridge.
„ Spare Calibration Bags 276M1210
276C3M1220-115 (for 115 VAC operation)
276C3M1220-230 (for 230 VAC operation)
System provides pressurized air to clean the membrane of
the sensor. System includes washer head with 25 ft. (7.6
m) long tubing for air delivery, quick-disconnect tube fitting,
and a compressor housed in NEMA 4X enclosure.
„ Washer Head Air Blast Cleaning Assembly 276G1230
A package of 12 disposable bags for only “Saturation
Method” air calibration. These bags provide a stable
atmosphere around the membrane for highly accurate
calibration.
Consists of washer head with 25 ft. (7.6 m) long tubing for
air delivery, and quick-disconnect tube fitting. Compressor
and enclosure are not included.
NOTE: The washer head assembly requires an external
source of pressurized air.
Engineering Specification
1. The sensor shall use three-electrode
polarographic Clark Cell technology
consisting of a silver reference electrode,
silver anode electrode, and a gold
cathode electrode.
2. The electrodes shall be in a replaceable
cartridge filled with electrolyte and
covered by a pre-installed, 50 micron
thick gas permeable membrane. The
membrane shall be constructed of
®
Teflon .
3. The sensor shall automatically
compensate for changes in process
temperature.
4. The sensor shall have an integral 15 ft.
(4.6 m) long cable terminated with an
MS-type quick-disconnect plug (metal or
plastic).
5. The sensor shall be provided with a
dozen disposable calibration bags to
perform “Saturation Method” air
calibrations. These special bags shall
provide a stable atmosphere around the
sensor membrane for highly accurate
calibration.
6. The sensor shall be Hach Company GLI
Model 5500-series.
Optional:
7. Hardware to mount the sensor shall be:
a) Handrail Mounting Hardware
MH276H00F consisting of a 1-1/2
inch diameter by 7.5 ft. (2.3 m) long
PVC pipe, PVC straight coupling for
sensor, swivel/pivot/pipe clamp
assembly, and surface-mount NEMA
4X junction box with quick-disconnect
receptacle for sensor with metal plug
on its cable.
b) Flotation Mounting Hardware
MH276J00F consisting of a 1-1/2 inch
diameter by 7.5 ft. (2.3 m) long PVC
pipe, PVC angle coupling for sensor,
ball float, swivel/pivot/pipe clamp
assembly, and surface-mount NEMA
4X junction box with quick-disconnect
receptacle for sensor with metal plug
on its cable.
c) Submersion Mounting Hardware
MH276R00F consisting of a 1-1/2
inch diameter by 5 ft. (1.5 m) long
PVC pipe, and surface-mount NEMA
4X junction box with quick-disconnect
receptacle for sensor with metal plug
on its cable.
d) Flow-through Union Hardware
MH378W4PZ consisting of a PVC
2-inch “Y” tee with socket-weld
connections, and a 2-inch union.
Dimensions
Inches (mm)
Handrail and Flotation Mounting Hardware
Flow-through Union Mounting Hardware
Submersion Mounting Hardware
276G1230 Washer Head Air Blast Cleaning Assembly
Data Sheet 5500
Worldwide Headquarters and Sales:
Hach Company
PO Box 389
Loveland, CO 80539-0389
U.S.A.
Phone:
Fax:
E-mail:
Web:
Represented By:
(800) 227-4224
(970) 669-2932
[email protected]
www.hach.com
In the interest of improving and updating its equipment, Hach reserves the right to alter specifications to equipment at any time.