Honeywell Sensing and Control offers: low pressure flow through sensors, low pressure sensors, and ultra-low pressure sensors. Low pressure flow through sensors have a compensated temperature range of 32°F to 122°F, a maximum input resistance of 11.5 kOhm, and a maximum overpressure ranging from 20 to 200 psi. Low pressure sensors have a pressure range of 0 to 250 psi, and an operating temperature range of -49°F to 257°F. Ultra-low pressure sensors have a pressure range from 0 to ±30.0" H2O, and a supply voltage range of 3.0 Vdc to 16 Vdc.

Ashcroft, Inc. offers: type XLDP ultra-low variable capacitance, type IXLDP ultra-low variable capacitance, type RXLDP (reduced cost) variable capacitance, and a variety of other low differential pressure transmitters/transducers. Products have applications for: HVAC, fume hood control, lab/clean/hospital room pressurization, medical lung function/breathing equipment, leak detection, filter monitoring, etc. Products have pressure ranges from 0.1" H2O to 200" H2O, a NEMA 1/2/4X stainless steel construction, and they are certified 0.25% and 1.5% accuracy. Materials include: glass, silicon, aluminum, Valox, brass, nickel, stainless steel, alumina, etc.

Omega Engineering, Inc. offers: wet/wet low differential pressure transmitters, solid state sensors for low differential pressure applications, low pressure transducer for measurements of clean gases, generic low differential pressure transducers, and economical very low differential pressure transducers with bi-directional ranges. Products have rater ranges from 0 to 28", operable temperature ranges from -30°F to 185°F, and a 0.1 to 0.25% accuracy rating. Other products offered by Omega include: custom transducers, PXM409, PX137, PX160, PX170, PX80-I-HEAD, etc.

All Sensors Corp. offers: MLV series low voltage pressure sensors, MEMS piezoresistive low pressure sensing die, BLVR Series low voltage pressure sensor, and BLV Series low voltage pressure sensors. Sensors have pressure ranges from 0 to 30" H2O, a supply voltage range from 1.8 to 12 Vdc, a common mode pressure range from 5 to 10 psig, and an operating temperature range from -25 to 85°C. Applications include: medical instrumentation, environmental controls, HVAC, industrial controls, portable/hand held devices, automotive fuel vapor recovery systems, etc.

Kavlico offers a variety of low-range differential pressure sensors, including: P993 PCB Variable Air Volume (mounted), P992 Variable Air Volume, P593, and P356. Sensors feature pressure ranges from 0-1 to 0-10" H2O, operating temperatures ranging from -20°C to 100°C, and a 0.5% accuracy. Sensors are made in the USA and are RoHS complaint. Materials include: fluorosilicone, ceramic, glass, plastic composite, brass, etc.

Sensirion, Inc. offers SDPx108 Series, SDP600 Series, SDP1000 Series, and ASP1400 differential pressure sensors. SDPx108 Series sensors have dynamic ranges available from 0 to 500 Pa and 0 to 3500 Pa. SDP600 Series sensors measure with the highest sensitivity and accuracy even at the low differential pressures of <10 Pa. SDP1000 Series sensors feature excellent long-term stability and measure even miniscule pressure differences below 0.25 Pa (0.001" of water). ASP1400 sensors have a dynamic range from 0.002 Pa to 100 Pa. These sensors have applications for: medical, HVAC, industrial, automotive, clean room control, process control, instruments, process automation, etc.

Measurement Specialties, Inc. offers Model 5701 Series low pressure sensors, These are factory-calibrated digital-interface pressure sensors with excellent long-term stability and covering an operating range of ±1 to ±4" of H2O. These sensors feature side-by-side ports enabling secure pressure connections to 3/32" ID hosing. The standby current is smaller than 0.14 μA, and the operating range is from -40°C to +85°C. The sensor measures 13 x 10.2 mm with a height of 6 mm (standard port configuration).

Parker Hannifin Corp. offers MPS-2 versatile pressure sensors. Sensors have a low pressure range from -14.7 to 72.5 PSI, and a vacuum pressure range from  0 to -30" Hg. Sensors are IP65 rated and CE marked, and have an output response time of less than 2.0 milliseconds.

GE Measurement & Control Solutions offers NPC-1210 low pressure sensors. These are solid-state, highly sensitive, and highly accurate sensors that are intended for printed circuit board mounting. The compensated temperature ranges from 32°F to 140°F, and the gauge/differential pressure ranges from 5 to 100 psi. Applications include: industrial automation, air flow monitors, process control, medical equipment, underground cable leak detection, ventilation, and respirator monitoring.

Dwyer Instruments, Inc. offers Series 672 low pressure transducers with pressure ranges from 10" to 400" w.c.  These sensors also feature a 0.25% F.S. accuracy. Applications include: liquid level, flood warning, waste water, clean room, and open channel flow.

Sensor Systems, LLC offers potentiometric pressure transducers. These transducers are based on a proprietary conductive film process that features an extremely low noise, proportional full scale voltage output. Limited voltage as well as current output options are also available in a variety of packages. These extremely rugged devices utilize both bourdon tube and capsule pressure sensors for the best value-performance match. Potentiometric transducers come in eight configurations.

Futurelec offers Motorola MPXV5004G ultra-low pressure sensors. These sensors provide a highly efficient 2.5% accuracy rating in the pressure range from 0 to 4kPa. These micro-machined pressure sensors are fully integrated and temperature compensated from 10°C to 60°C and offer exceptional value among integrated low-pressure sensors. Sensors have a 0.2 to 4.7v output, making them well suited for micro-processor/micro-controller-based products/systems. Applications include: washing machines, liquid level sensing, health care equipment, commercial, industrial, and consumer appliances.

Validyne Engineering Sales Corp. offers DP15 low pressure sensors. These sensors make pressure measurements from ±2.22" H2O to ±3200 psi in one compact unit. Rugged and reliable, the DP15 provides superior accuracy for measuring low-pressure liquids and gasses, while it withstands the abuse of field and laboratory testing. These sensors have a variety of features including: shock vibration, stainless steel construction, fast response time, wet/wet capability, economical, etc.

Delphi offers low pressure engine and transmission sensors. Features include: electronic compensation, reliable and robust, mounting flexibility, EMI protection, all-silicon technology, etc. The operating pressure ranges from -3.75 kPa to 1.25 kPa, and the operating temperature ranges from -40 to 90°C. Applications include: fuel vapor pressure measurement, air filter pressure measurement, bladder-type occupant sensing in vehicle seating programs, non-automotive filtering applications, etc.

Digi-Key Corp. offers amplified low-pressure sensors. Sensors range from 0.4" H2O to 30" H2O, they are temperature compensated, and they have a 4V output. Sensors have applications for: medical instrumentation, environmental controls, HVAC, etc.