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Senva P4-0250-BU1LP : Dry Media Pressure Transmitter, (Fixed Range) Uni-Directional 0 to 2.5", 0-10VDC Output, LCD Display, Duct Probe, Buy American Act Compliant, 7 Year Limited Warranty

Senva P4-0250-BU1LP P4 Value Series Dry Pressure Transmitter, 0 to 2.5 in WC Unidirectional, 0-10 VDC Output, 1.00% Accuracy, LCD Display, Duct Probe, BAA Compliant, Made in USA

Senva

MSRP: $293.48
$126.60
(You save $166.88 )
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SKU:
P4-0250-BU1LP
Condition:
New
Availability:
Ships in 1-2 Days
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Range0 to 2.5 in WC
DirectionUnidirectional
Output Signal0-10 VDC, 3-wire VAC or VDC powered
Accuracy1.00%
DisplayLCD Display
Duct ProbeIncluded
Warranty7-Year Limited
OriginMade in USA

The Senva P4-0250-BU1LP is part of the Senva P4 Value Series of fixed-range dry-media pressure transmitters - the cost-optimized line in the P4 family, engineered for high-volume HVAC and BAS deployments where a calibration certificate is not required but a 7-year warranty, MEMS silicon sensor, and Made-in-USA manufacturing are still valuable. It senses 0 to 2.5 in WC (unidirectional) and outputs a linear 0-10 VDC signal (3-wire VAC or VDC powered). Built around a MEMS silicon piezoresistive sensor with non-position-sensitive design, manual or contact-closure auto-zero, and a patented enclosure that integrates high-density DIN-rail mounting with 3/8 in conduit-ready entry - no separate adapters needed for typical commercial HVAC installs. This SKU ships with the optional LCD display for on-board pressure readout and the integrated duct probe for direct in-duct installation.

Best for: building zone pressure monitoring, filter condition detection, duct static pressure measurement, data center hot/cold-aisle dP, clean room and isolation room differential, and other dry-air HVAC applications. The 0 to 2.5 in WC range is well-matched to mid-range duct static and AHU monitoring. For applications requiring a documented calibration certificate, see the P4 Precision Series variant of the same range and configuration.
7-YEAR
WARRANTY
Industry-leading 7-year limited warranty. Senva backs the P4 Series electronics for seven years - significantly longer than typical 2-5 year warranties on competing pressure transmitters. ZOT Supply is an authorized Senva distributor; product ships factory-new from Beaverton, Oregon with full manufacturer warranty intact.
Buy American Act (BAA) Compliant. The Senva P4 Series is manufactured in the USA and qualifies under BAA and TAA requirements for federal, state, and municipal procurement contracts. Compliance documentation is available from Senva on request.

Key Features

Cost-Optimized for High-Volume HVAC

The P4 Value Series delivers MEMS silicon precision and 7-year warranty coverage at a price point engineered for high-volume specification on commercial HVAC and BAS projects. +/-1.00% of range accuracy (combined non-linearity, hysteresis, and repeatability at 70 F).

MEMS Silicon Piezoresistive Sensing

Solid-state silicon sensing element with precision factory calibration. Non-position-sensitive design means the transmitter can be mounted flat, vertical, or DIN-rail without zero shift. Thermal drift is 0.02% FSO per deg C (0.01% per deg F) referenced to 72 F.

0-10 VDC Output Signal

Provides a linear 0-10 VDC output proportional to applied differential pressure. 3-wire vac or vdc powered with 12-30 VDC or 24 VAC input. Drop-in compatible with virtually any BAS, DDC, or analog control input.

Manual + Contact-Closure Auto-Zero

Front-panel pushbutton zero plus remote auto-zero via contact-closure input. Hold the ZERO SET button for 2 seconds with no pressure applied (or temporarily connect H and L ports together) to re-zero. Zero drift is <0.004 in WC per year typical.

Patented DIN-Rail and Conduit-Ready Mount

Patented enclosure design with two DIN-rail mounting orientations (back or side - side saves panel space for high-density panels), plus an integrated 3/8 in flex conduit cover - no separate fittings or adapters required for typical commercial install.

On-Board LCD Display

5-digit LCD shows live differential pressure for setup, balancing, and troubleshooting without needing a separate handheld meter. The LED indicator next to the display shows power heartbeat, auto-zero complete, and 110% over-pressure events - useful for locating the unit in ductwork.

Technical Specifications

SpecificationValue
ModelP4-0250-BU1LP
SeriesP4 Value
Pressure Range0 to 2.5 in WC
DirectionUnidirectional
Accuracy+/-1.00% of range (combined non-linearity, hysteresis, repeatability at 70 F)
Output Signal0-10 VDC, 3-wire VAC or VDC powered
Supply Voltage12-30 VDC or 24 VAC, 30 mA max
Other Outputs Available (Family)4-20 mA loop powered, 4-20 mA 3-wire, 0-5 VDC, 0-10 VDC
Sensor TypeMEMS silicon piezoresistive, precision calibrated
Zero FunctionPushbutton + contact-closure auto-zero
Zero ToleranceIncluded in accuracy specification
Span Tolerance+/-1.00% (+/-1% +/-0.005 in WC for ranges below 0.10 in WC)
Zero Drift (1 year)0.004 in WC/year max (0.4% for units over 0.5 in WC)
Thermal Shift (Zero and Span)0.02% FSO per deg C (0.01% FSO per deg F), measured from 22 C (72 F)
Response Rate8 seconds (full scale)
Overpressure41.5 in WC
Max Static Line Pressure41.5 in WC
Burst Pressure83 in WC
Position SensitivityNon-position sensitive
Operating Temperature-4 to 140 F (-20 to 60 C)
Compensated Temperature-4 to 140 F (-20 to 60 C)
Operating Humidity0 to 95% RH, non-condensing
Media CompatibilityDry, oil-free air or nitrogen (N2)
Display5-digit LCD
Duct ProbeIntegrated duct probe included
Enclosure MaterialUL94-5VB rated, ABS
Enclosure RatingNEMA 1
Conduit Entry3/8 in flex conduit cover (integrated)
Tubing ConnectionHose barbs, accepts 1/8 in and 1/4 in ID tubing
DIN Rail MountingBack or side (two orientations) - patented design
Dimensions4.75 x 4.20 x 1.82 in (approx)
Weight0.20 lb
ComplianceCE, RoHS
Procurement ComplianceBuy American Act (BAA) and TAA compliant
Country of OriginMade in USA - Beaverton, Oregon
Warranty7-year limited (electronics)
Manufacturer Part NumberP4-0250-BU1LP

Documentation

PDFP4 Value Series DatasheetPDFInstallation InstructionsPDFEngineering SpecificationsPDFP4 vs 264 ComparisonPDFBAA / TAA Commerce DeclarationPDFMade in USA CertificatePDFTubing Length Guide

Frequently Asked Questions

What pressure range and direction does the P4-0250-BU1LP measure?
This is the fixed-range 0 to 2.5 in WC variant, unidirectional. The output signal scales linearly across the range. Overpressure tolerance is 41.5 in WC, max static line pressure is 41.5 in WC, and burst pressure is 83 in WC - the sensor handles typical duct surge events well above the sensing range.
How does the P4 Value accuracy compare to other transmitters?
The P4 Value Series carries +/-1.00% of range accuracy, which combines non-linearity, hysteresis, and repeatability at 70 F. This is the cost-optimized tier in the P4 family and is the right pick for general HVAC building zone pressure, filter monitoring, and duct static measurement where a calibration certificate is not required. For applications requiring documented accuracy traceable to NIST, see the P4 Precision Series at 0.25% or 0.50% accuracy with 7-point NIST cert.
How do I wire the 0-10 VDC output?
This is the 3-wire 0-10 VDC version. Use V+ for 12-30 VDC or 24 VAC supply, COM for the supply common, and the OUT terminal for the voltage signal to the receiver. Senva recommends a dedicated isolation transformer when using 24 VAC since one side of the secondary connects to signal common. Always de-energize power before wiring.
What does the LCD display show?
The 5-digit LCD shows live differential pressure in the same units as the configured range. The display is useful during commissioning and balancing - you can verify what the transmitter is sensing without a separate handheld meter. The LED status indicator next to the display flashes every 5 seconds for normal operation, flashes rapidly at 110% over-pressure events, and momentarily flashes after a successful auto-zero operation.
What's included for duct mounting?
This SKU ships with the integrated duct probe that threads directly into the back of the enclosure for in-duct installation. The probe accepts both 1/8 in and 1/4 in ID tubing on the hose barbs. For applications where the probe needs to be mounted remotely (with the transmitter on a panel or wall), Senva also offers the RP-6 6-inch remote probe (sold separately) that uses the same threaded interface.
How do I zero the transmitter and what media can it measure?
The P4 is rated for dry, oil-free air and nitrogen (N2) only. To zero: with power applied and no pressure differential (or with the H and L ports temporarily tied together), press and hold the ZERO SET button for 2 seconds. The LED will flash momentarily on successful zero. The unit also supports remote auto-zero via a contact-closure input, useful for programmatic re-zeroing from the BAS. Senva recommends a periodic re-zero to compensate for the small zero drift over time (typically under 0.004 in WC per year).
Brand:
Senva
Series:
P4 Value
Product Type:
Dry Media Differential Pressure Transmitter
Pressure Range:
0 to 2.5 in WC
Range Code:
0250
Direction:
Unidirectional
Output Signal:
0-10 VDC
Output Wiring:
3-wire VAC or VDC powered
Supply Voltage:
12-30 VDC or 24 VAC
Accuracy:
1.00%
NIST Certificate Included:
No
Display:
5-Digit LCD
Duct Probe:
Integrated probe included
Sensor Type:
MEMS silicon piezoresistive
Zero Function:
Pushbutton + contact-closure auto-zero
Zero Drift:
0.004 in WC/year max
Thermal Shift:
0.02% FSO/C (0.01% FSO/F)
Response Rate:
8 seconds full-scale
Overpressure:
41.5 in WC
Max Static Line Pressure:
41.5 in WC
Burst Pressure:
83 in WC
Position Sensitivity:
Non-position sensitive
Operating Temperature:
-4 to 140 F, -20 to 60 C
Operating Humidity:
0 to 95% RH non-condensing
Media:
Dry oil-free air, nitrogen (N2)
Enclosure:
UL94-5VB ABS, NEMA 1
Tubing Accepted:
1/8 in and 1/4 in ID
Conduit Entry:
3/8 in flex (integrated cover)
DIN Rail Mounting:
Back or side (patented design)
Compliance:
CE, RoHS
Procurement:
Buy American Act (BAA) and TAA Compliant
Country of Origin:
USA (Beaverton, Oregon)
Warranty:
7-year limited
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