1-888-TC-OMEGA (1-888-826-6342) US and Canada
1-203-359-1660 INTERNATIONAL
 Accessibility  Skip navigation  Site Map  Help  Search field  View shopping cart  View shopping cart  Skip to Navigation

HVAC Style Low Differential Pressure Transmitters
Discontinued Product


PX291:HVAC Style Low Differential Pressure Transmitters
Discontinued Product
$196.00  PX291-010WD5V
Voltage or Current Outputs
Low Power Consumption
No Moving Parts to Wear
Position Insensitive
Reliable Long Term Stability
Rugged Flame Retardant Case
Click to scroll below to order See Specs PDF Related Items View a printer friendly page

The PX291 is no longer available. Please see the PX655 series as a possible substitute or contact our sales department.

The PX291 Series of differential pressure transmitters is designed to measure low pressures while using little power. A selection of ranges is available to meet most industrial and laboratory applications. The transmitters are housed in a flame-retardant, glass-reinforced polyphenylene oxide case. Electrical connections are made by means of a 3.8" terminal with #6 screws. There are no moving parts and the transducers are virtually position insensitive. The span and zero settings are made via 20-turn potentiometers, for easy and precise adjustments. The pressure sensing element is a differential capacitive cell for the low pressure ranges from 0.1 to 5 inH2O and a piezoresistive chip for ranges above 5 inH2O. Both sensors ensure reliability and long-term stability.

General: Measures differential, gage pressure or vacuum
Excitation: 11 to 32 Vdc reverse polarity protected
Voltage Output Models: 0 to 5 Vdc 3-wire, source or sink 3.5 mA, short circuit protected, current draw = 10 mA
Current Output Models: 4 to 20 mA, output limited to approximately 3.85 mA at low end and 25 mA at high end Maximum Current Loop Resistance: RL = (Vs - 11) x 50
Accuracy: ±1% includes linearity, hysteresis
Calibration: NIST-traceable
Operating Temperature: 0 to 45°C (32 to 115°F)
Temperature Effects:
Zero: ±0.05%/°C
Span: ±0.02%/°C
Operating Humidity Range: 10 to 90% non-condensing
Shock Resistance: 10 g (11 ms)
Vibration Resistance: 5 g to 50 Hz
Overpressure: See order chart for maximum safe momentary overpressure
Media Compatibility: Suitable for air or inert gas
Pressure Connection: 3.16" Dia. tube connections with integral filters at both ports, suitable for 1.8" ID TygonR or polyurethane tubing (3 to 4 mm) or 1.4" OD polyethlene tubing (6 mm)
Electrical Connection: External 3.8" terminal strip with #6 screws
Case Material: Flame-retardant, glass-reinforced polyphenylene oxide
Dimensions: 36 H x 76 W x 131 mm L (1.4H x 3.0W x 5.15"L)
Weight: 190 g (6.72 oz)

If the measured differential pressure is expected to go from positive to negative, a transducer with offset (elevated zero) should be ordered. The standard models in the order chart have no offset (i.e., at zero differential pressure, the output is 0 Vdc or 4 mA). 2 offset options are available: gAh 1.4 Span Offset At zero differential pressure, the output is 1.25 Vdc or 8 mA
Allowable pressure excursion: -33% to 100% of range gBh 1.2 Span Offset At zero differential pressure, the output is 2.5 Vdc or 12 mA
Allowable pressure excursion: -100% to 100% of range
Examples: PX291-001WD5V-A will have a range of 1"

All dollar amounts on this site are shown in US currency.

 Note: See Specifications for desription of the elevated zero option.
 Part Number Builder
(1) (2) (3)   

Option Descriptions
(1) Range
0.1 for 0-0.1
0.2 for 0-0.2
0.3 for 0-0.3
0.5 for 0-0.5
001 for 0-1
002 for 0-2
003 for 0-3
005 for 0-5
010 for 0-10
(2) Output
5V for 0 to 5 Vdc
I for 4 to 20 mA
(3) Offset Options
for Leave Blank For No Offset
-A for 1/4 Span Offset
-B for 1/2 Span Offset
 NOTE: All combinations may not be valid, check spec sheet for valid part numbers.

 Related Links - Related Products
 Related Products
DP24-E DP24-E:
1/8 DIN Economical Process Meter
DP25B Series DP25B Series:
1/8 DIN Process Meter & Controller
DP41 DP41:
1/8 DIN High Performance Temperature, Process and Strain Meter
Keywords:HVAC Style , low cost pressure sensors low pressure transducers water pressure transducer water transducer

   Back to topBack to top

MMV | 78 | 010