The Senva P4-2500-CB2XP is a P4 Precision Series dry-media differential pressure transmitter with a fixed -25 to +25 in WC bidirectional range and a 4-20 mA (2-wire) output, certified to ±0.25% of range with 7-point NIST calibration. A MEMS silicon piezoresistive element senses dry, oil-free air or nitrogen for building pressure, filter status and duct static applications where the sensor accuracy has to be documented. It ships with a duct probe.
Specifications on this page are taken from the Senva P4 Precision Dry Pressure datasheet, Installation Instructions document 152-0351-0H revised 3/19/2026, and Senva's P4 Series Engineering Specifications.
- Building (zone) pressure control
- Filter condition and differential monitoring
- Supply and return duct static pressure using the included probe
- OEM HVAC equipment
- Data centers
WARRANTY
Key Features
7-Point NIST Certificate
Every unit ships with a 7-point NIST calibration certificate listing applied pressure, measured output and non-linearity error at each point. Senva certifies conformance to ISO 17025 with NIST-traceable equipment.
Precision Calibrated MEMS Element
A precision-calibrated, temperature-compensated MEMS silicon piezoresistive element. The P4 supports high-density DIN mounting that saves valuable panel space.
Non-Position Sensitive
Senva specifies the pressure element as precision calibrated, temperature compensated and non-position sensitive, and supports flat, side and DIN mounting orientations.
Push-Button and Remote Zero
Zero the sensor by holding the ZERO SET button for two seconds, or trigger it remotely through a dry-contact closure from the controller.
LED Status Indication
A single LED flashes every five seconds in normal operation, flashes rapidly above 110% of range, and pulses when zeroing completes - which also makes the sensor easy to locate in ductwork.
Duct Probe Included
This model is cataloged with Senva's static probe. It mounts integrated to the unit for duct static, or remotely for room and filter pressure, and accepts both 1/8 in and 1/4 in ID tubing.
Technical Specifications
| Specification | P4-2500-CB2XP |
|---|---|
| Product Type | Dry-media differential pressure transmitter |
| Series | Senva P4 Precision Series |
| Pressure Range | -25 to +25 in WC (bi-directional) |
| Approx. SI Equivalent (calculated) | 6,221 Pa full scale - unit conversion from the inch w.c. range, not a Senva catalog Pa range |
| Output Signal | 4-20 mA, 2-wire, loop powered |
| Outputs Available in Series | 4-20 mA loop powered, 4-20 mA 3-wire, 0-5 VDC, 0-10 VDC |
| Power Supply | 12-30 VDC (loop powered, DC only) |
| Accuracy | ±0.25% of range |
| Calibration | 7-point NIST calibrated |
| Calibration Standard | Senva certifies on the calibration certificate supplied with each unit that the certification conforms to ISO 17025 and that all certification equipment is NIST traceable |
| Zero Tolerance | Included in accuracy specification |
| Span Tolerance | ±1.00% |
| 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/C (0.01% FSO/F) measured from 22 C (72 F) |
| Auto-Zero Input | Push-button and contact closure |
| Display | None (LED status indication) |
| Duct Probe | Included |
| Sensor Type | MEMS silicon piezoresistive, precision calibrated |
| Media Compatibility | Dry, oil-free air or nitrogen (N2) |
| Response Rate | 8 seconds (full scale response time) |
| Position Sensitivity | Non-position sensitive |
| Overpressure | 332 in WC (25 in WC range models) |
| Max Static Line Pressure | 332 in WC (25 in WC range models) |
| Burst Pressure | 415 in WC (25 in WC range models) |
| Operating Temperature | -4 to 140 F (-20 to 60 C) |
| Compensated Temperature | -4 to 140 F (-20 to 60 C) |
| Operating Humidity | 0 to 95% RH, non-condensing |
| Pressure Connections | Hose barbs accept 1/8 in and 1/4 in ID tubing |
| Mounting | Screw mount to duct, panel mount with self-tapping screws, or DIN rail (forward for LCD viewing, or sideways to save panel space) |
| Terminal Torque | 3.5 in-lb |
| Enclosure Material | UL94 5VB, ABS |
| Enclosure Rating | NEMA 1 |
| Dimensions (Transmitter) | 4.75 in H x 1.82 in W x 0.90 in D |
| Dimensions (Duct Probe) | 6.09 in probe assembly; 1.50 in and 0.75 in head dimensions |
| Agency Compliance | CE, RoHS |
| Country of Origin | Made in USA - Senva, Beaverton, Oregon |
| Warranty | 7-year warranty |
| Manufacturer Part Number | P4-2500-CB2XP |
Note: the P4 is rated for dry, oil-free air or nitrogen only. Senva does not intend the P4 for life-safety, nuclear or hazardous/classified locations. Form a drip loop in the tubing so condensation cannot reach the hose barbs. Senva's P4 Series Engineering Specifications sheet states an ambient range of -20 to +50 C. The figure above is from the current P4 Precision datasheet and installation instructions, which control; confirm with Senva if your specification depends on the upper limit.
Documentation
P4 Precision Dry Pressure DatasheetInstallation Instructions (152-0351-0H)P4 Series Engineering SpecificationsSample 7-Point NIST Calibration CertificateApp Note: Maximum Length of Dry-Pressure HoseSenva BABAA / TAA / ARRA DeclarationRelated P4 Precision Models
Frequently Asked Questions
What pressure range does the Senva P4-2500-CB2XP measure?
P4-2500-CB2XP is a -25 to +25 in WC (bi-directional) transmitter (approximately 6,221 Pa full scale by calculation). The range is set at the factory by the 2500 range code in the part number and is not field adjustable.
How is the bi-directional range on P4-2500-CB2XP scaled?
The B direction code makes the range symmetric about zero, so it spans ±25 in WC with zero pressure at the electrical mid-point of the output. Every NIST-calibrated P4 ships with its own individualized calibration certificate stating the certified endpoints for that serial number - Senva's published example, for a bi-directional 0050 unit, is certified from -0.50 to 0.50 in H2O across a 0 to 10 VDC output. Check the certificate supplied with your unit for its as-built values.
Is the Senva P4-2500-CB2XP NIST calibrated?
Yes. This part number specifies ±0.25% of range with 7-point NIST calibration. The certificate lists 7 applied-pressure points with the measured output and non-linearity error at each one, and Senva certifies conformance to ISO 17025 using NIST-traceable equipment. Senva's stated accuracy includes non-linearity, hysteresis and repeatability at 70 F.
What output signal and supply voltage does P4-2500-CB2XP use?
It provides a 4-20 mA signal on a two-wire loop-powered connection, so the loop supplies the sensor and only two conductors are landed. Senva specifies 12-30 VDC and notes that 2-wire wiring is DC only. Senva lists 4-20 mA loop powered, 4-20 mA 3-wire, 0-5 VDC and 0-10 VDC across the P4 Precision Series, and the output is fixed by the part number rather than field selectable. Terminals are torqued to 3.5 in-lb.
Does P4-2500-CB2XP include a duct probe?
Yes - the P suffix in this part number specifies the duct probe. The probe integrates with the unit for duct static pickup or mounts remotely for room and filter pressure, and it accepts both 1/8 in and 1/4 in ID tubing.
Is the Senva P4-2500-CB2XP Made in USA and Buy America compliant?
Yes. Senva manufactures the P4 series in Beaverton, Oregon, and lists P4 series dry pressure products on its Buy America / Buy American Act / BABAA / ARRA / TAA Commerce Declaration updated 04/21/2026, with domestic component cost exceeding 65 percent.
- Series:
- P4 Precision
- Product Type:
- Dry Differential Pressure Transmitter
- Pressure Range:
- -25 to +25 in WC
- Pressure Range Class:
- Medium (5 to 25 in WC)
- Direction:
- Bidirectional
- Output Signal:
- 4-20 mA (2-wire loop)
- Accuracy:
- 0.25% of Range
- Calibration:
- 7-Point NIST Calibrated
- Display:
- None
- Probe:
- Duct Probe
- Made in USA:
- Yes
