SOLUTIONS FOR OXYGEN CONCENTRATORS - Honeywell
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SOLUTIONS FOR
OXYGEN
CONCENTRATORS
Sensors and Switches
Application Note
Oxygen concentrators reduce the level
SOLUTIONS FOR OXYGEN
of nitrogen in the air, and increase the CONCENTRATOR
oxygen level. APPLICATIONS
• Pressure Sensors – Board
BACKGROUND SOLUTIONS Mount
Oxygen concentrators are used to assist Honeywell manufactures many sensors
• Pressure Sensors – Heavy Duty
patients with respiratory illnesses or and switches that may be used in
lung disease, who have difficulties in oxygen concentrators. Our solutions • Airflow Sensors
absorbing oxygen into the bloodstream. are designed to help control pressure • Oxygen Sensors
and airflow, detect failures, enhance • Magnetic Sensors
An oxygen concentrator receives air,
equipment performance and efficiency • Basic and AML Switches
purifies it and then distributes the newly
and act as a high pressure warning
formed air. Typically, air is composed • Pressure Switches
within the oxygen concentrator. (See
of 80 percent nitrogen and 20 percent
Figure 1.)
oxygen. An oxygen concentrator
increases the oxygen content to over 90
percent. Sieve bed filters contain Zeolite,
which removes the nitrogen from the air.
Oxygen concentrators can be used in
hospitals, home and some devices are
portable.
Figure 1. Solutions for Oxygen Concentrator Applications
1 Pressure Sensors - Board Mount
Muffler MicroPressure MPR Series,
Molecular
Molecularsieve
sieve Basic ABP Series
bed
bed11
2 Pressure Transducers - Heavy Duty
1 Pressure
MIP Series, MLH Series
Surge Four way
reducing
tank
(Air)
(air)
solenoid Cross over
orifices 3 Airflow Sensors
AWM90000 Series
valve valve
2
4 Oxygen Sensor
Molecular sieve
OOMLF Series
bed 2
Heat 5 Magnetic Sensors
Electronic SS360/SS460 Series
exchanger
control circuit
6 Basic and AML Switches
DM, ZD, ZW, V15W Basics; AML Series (PB and Rockers)
Product
tank Pressure Switches
Compressor Motor (oxygen) 7 LE and LP Series; 5000 Series
5 6 Flow meter Pressure
Oxygen adjustment
7 Out regulator
valve
Air In 1 3 4
TABLE 1. PRESSURE SENSORS AND
TRANSDUCERS FEATURES
MICROPRESSURE MPR SERIES
• Pressure range 60 mbar to 2.5 bar
• Measures absolute and gage
• Amplified and temperature
compensated
MLH Series MIP Series MicroPressure, Basic ABP Series
• Digital (I2C/SPI) output (24-bits)
MPR Series
BASIC ABP/ABP2 SERIES
• Pressure range 5 mbar to 25 bar
PRESSURE SENSORS • Measures absolute, gage and
Board Mount: MicroPressure MPR Series, Basic ABP. ABP2 Series differential
Heavy Duty: MIP, MLH Series • Amplified and temperature
compensated
Function/Action Smaller equipment size also means lower
• Analogue or digital (I2C/SPI) output
power consumption, as well as greater
• Monitor sieve bed pressure to • Supports liquids and dry gases
portability.
maintain the optimal pressure so that MIP SERIES
enough oxygen can be generated, but Heavy duty pressure sensors are • Rugged, stainless steel construction
still remain at a relatively high oxygen used to monitor and control the flow • Ratiometric output: 0.5 Vdc to 4.5 Vdc
concentration of air and oxygen delivered to oxygen • Total Error Band up to ±0.75 %FSS
concentrators, and used to monitor and • High accuracy: ±0.15 %FSS BFSL
Honeywell board mount pressure
control pressure within the surge tank, • CE, RoHS, REACH compliant
sensors are extensively used within
providing feedback to the compressor
medical equipment due to high levels of MLH SERIES
which allows the compressor to maintain
accuracy, sensitivity and reliability (see • Pressure range of 6 bar to 550 bar,
the appropriate pressure level. Heavy 50 psi to 8,000 psi
Table 1). Board mount pressure sensors
duty pressure sensors support a wide • ±0.25% full scale accuracy (BFSL)
may be used to detect when the patient
variety of media and are offered with a • Total Error Band as low as 2 %FSS
begins to inhale so that oxygen can then
wide choice of ports and outputs (see • Less than 2 ms response time
be delivered efficiently and effectively.
Table 1).
Not only does this enhance system • Fully temperature compensated,
response time, it also minimizes wasting calibrated and amplified
oxygen when the patient isn’t inhaling, • Rated IP65 or better
allowing the oxygen concentrator to be
smaller and to operate more efficiently.
APPLICATION NOTE | Solutions for Oxygen Concentrators | sps.honeywell.com/ast 2
AIRFLOW OXYGEN MAGNETIC
SENSORS SENSORS SENSORS
AWM90000 Series OOMLF Series SS360/SS460
Function/Action Function/Action Function/Action
• Monitor a patient’s breathing to • Measure and control oxygen • Control motors and sense motor
detect when the patient inhales, so concentration level of the air delivered speed
that oxygen is only supplied when to the patient These magnetic position sensors are
required and isn’t wasted. This helps Oxygen sensors are the oxygen-sensing designed to provide reliable, highly
to minimize the overall system size by component of an oxygen analyzer that accurate output for smooth motor
supplying oxygen only when required measures oxygen concentration in control that reduces noise and vibration
The AWM90000 Series (see Table 2) is breathing gas mixtures. Honeywell’s in the pump’s motor assembly and
designed to detect ultra-low flow levels lead-free oxygen sensors are an improves its efficiency (see Table 4).
at 0,1 cm3. This enhanced sensitivity innovative one-to-one, drop-in Its solid state reliability often reduces
may be used to detect when the patient replacement for existing lead-based repair and maintenance costs.
exhales and when the system should oxygen sensors (see Table 3). Their small size allows for design into
reduce airflow, easing exhalation and The OOMLF Series fulfills the lead-free many compact, automated, lower-
improving patient comfort. RoHS II regulatory requirements. In cost assemblies. A thermally balanced
Honeywell’s airflow sensors deliver a addition, these oxygen sensors are also integrated circuit that is accurate over
low pressure drop (down to 0,2 cm- temperature compensated and provide a full temperature range is designed to
H2O at 200 SLPM), leading to lower high accuracy of the sensor signal, low provide proper fan functionality.
flow resistance and improved patient signal drift and low cross interferences
TABLE 4. MAGNETIC SENSORS
comfort. from common components of breathing
FEATURES
gases.
TABLE 2. AIRFLOW SENSORS SS360/SS460
FEATURES TABLE 3. OXYGEN SENSORS • Fast response time
AWM90000 SERIES FEATURES • No-chopper-stabilization
• Bi-directional sensing capability OOMLF SERIES • High sensitivity
• Highly stable null and full-scale • Compliant with European MDD (CE • Latching magnetics
• Low pressure drop certification) • Wide operating voltage range of
• Compact package design • Compliant to EU RoHS Directive 3 Vdc to 24 Vdc
• Low hysteresis and repeatability 2011/65/EU as amended by • Built-in reverse voltage
errors Directive 2015/863
• Fast response time (1 ms typical) • Meets ISO 80601-2-55
• Low power consumption • Designed and manufactured
according to EN ISO 13485
• Higher accuracy and reliability in
response
• Resistant to N2O
APPLICATION NOTE | Solutions for Oxygen Concentrators | sps.honeywell.com/ast 3
BASIC AND AML
PUSHBUTTON SWITCHES PRESSURE SWITCHES
DM, V15W, ZW Series; ZD Series; LP Series; LE Series; 5000 Series
AML Series
Function/Action
Function/Action
• Act as high pressure warnings in the
• Used as on/off operator controls, as event of error or over-pressure
well as detection for covers, panels
Honeywell LP/LE pressure switches
and doors
are often located on the output of
MICRO SWITCH basic switches can be the oxygen concentrator’s pressure
used as presence/detection for covers, regulator and can act as high-pressure
panels and doors acting as a fail-safe warnings in the event of an error (see
to prevent switching the machine when Table 6). The switch could illuminate
doors/panels are ajar. Several series a warning light/sound, or simply cut
are sealed to protect against fluids (see power in the event of a dangerous, over-
Table 5). pressure event. In some cases, it may
MICRO SWITCH AML Series are also just shut down the motor.
available as pushbuttons, key switches
TABLE 6. PRESSURE SWITCHES
and rockers/paddles (see Table 5). They FEATURES
are often used in medical equipment as
LP SERIES, LE SERIES
off/on operator controls on the external
• Pressure switching set point range:
face of the equipment.
3.5 psi to 150 psi
TABLE 5. BASIC SWITCHES AND • Factory set and field adjustable
PUSHBUTTON FEATURES • 500 psi proof
MICRO SWITCH BASICS • Configurable
• Watertight, dust tight; leaded • IP67 sealing rating
versions are sealed to IP67 • Hysteresis option (LP)
• High current capacity • More than 15 pressure port options
• Many different switch characteristics, and over 30 electrical terminations
actuators, and terminations • Smart diagnostic technology option
• Miniature and subminiature size 5000 SERIES
• Lower power consumption • Designed to stand up to extended
AML PUSHBUTTONS duty applications
• Pushbuttons, paddles, rockers, • 0 psi to 150 psi
key-actuated, and indicators within • Factory set
AML Series for coordinated panel • Gold contacts
appearance • 500 psi proof
• Less than 1.75 inch panel depth • #8-32 screws, 1/4 in blade,
• Furnished lighted or unlighted Metripack options
APPLICATION NOTE | Solutions for Oxygen Concentrators | sps.honeywell.com/ast 4
WARRANTY/REMEDY
mWARNING
IMPROPER Honeywell warrants goods of its
INSTALLATION manufacture as being free of defective
• Consult with local safety agencies materials and faulty workmanship
and their requirements when during the applicable warranty period.
designing a machine control link, Honeywell’s standard product warranty
interface and all control elements
that affect safety. applies unless agreed to otherwise by
• Strictly adhere to all installation Honeywell in writing; please refer to your
instructions. order acknowledgement or consult your
Failure to comply with these local sales office for specific warranty
instructions could result in death
or serious injury. details. If warranted goods are returned
to Honeywell during the period of
coverage, Honeywell will repair or replace,
at its option, without charge those items
that Honeywell, in its sole discretion,
finds defective. The foregoing is buyer’s
sole remedy and is in lieu of all other
warranties, expressed or implied,
including those of merchantability
and fitness for a particular purpose.
In no event shall Honeywell be liable
FOR MORE INFORMATION for consequential, special, or indirect
Honeywell Advanced Sensing Technolo- damages.
gies services its customers through a While Honeywell may provide application
worldwide network of sales offices and assistance personally, through our
distributors. For application assistance, literature and the Honeywell web site, it
current specifications, pricing, or the is buyer’s sole responsibility to determine
nearest Authorized Distributor, the suitability of the product in the
visit sps.honeywell.com/ast or call: application.
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Europe +44 1344 238258 believed to be accurate and reliable as of
this writing. However, Honeywell assumes
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009047-8-EN | 8 | 11/21
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