Crystal XP2i-DP Digital Differential Pressure Gauge
| Brand | Crystal |
|---|---|
| Origin | Denmark |
| Model | XP2i-DP |
| Type | Intrinsically Safe Wet/Wet Differential Pressure Gauge |
| Accuracy | ±0.1% of full scale |
| Measurement Range | Vacuum to Positive Differential Pressure |
| Housing | Marine-grade corrosion-resistant stainless steel (316 SS) |
| Configuration | Panel-mount or portable |
| Pressure Units | User-selectable (kPa, bar, psi, inH₂O, mmH₂O, mbar, etc.) |
| Data Logging | Optional DataLoggerXP module (32,000-point capacity, 1-year continuous logging in ULP mode) |
| Power | Optimized long-life battery with Ultra-Low-Power (ULP) operation |
| Compliance | ATEX/IECEx certified for hazardous areas (Zone 0/1, Class I Div 1), IP67 ingress protection |
Overview
The Crystal XP2i-DP Digital Differential Pressure Gauge is an intrinsically safe, high-accuracy instrument engineered for reliable wet/wet differential pressure measurement across demanding industrial, pharmaceutical, HVAC, and cleanroom environments. Based on precision silicon piezoresistive sensing technology with temperature-compensated signal conditioning, the XP2i-DP delivers stable, repeatable readings from full vacuum (–100 kPa gauge) through positive differential ranges—enabling seamless monitoring of filter integrity, duct static pressure, containment hoods, and laminar flow cabinets. Its dual-port, isolated sensor architecture eliminates cross-contamination risk between process media, making it suitable for applications involving aggressive or condensing gases and liquids. Designed and assembled in Denmark, the device complies with rigorous European quality standards and is certified for use in explosive atmospheres without external barriers.
Key Features
- Intrinsically safe design certified to ATEX II 1G Ex ia IIC T4 Ga and IECEx Ex ia IIC T4 Ga—approved for Zone 0, Zone 1, and Class I Division 1 hazardous locations.
- ±0.1% full-scale accuracy over a compensated temperature range of –10 °C to +50 °C, with long-term stability better than 0.15% FS/year.
- Marine-grade 316 stainless steel housing rated IP67—resistant to salt spray, chemical exposure, and mechanical impact per IK08.
- True wet/wet differential configuration: both high- and low-pressure ports are fluid-compatible and electrically isolated; no reference to ambient air required.
- Zero-button interface with dedicated function keys—no nested menus, no firmware training required. Calibration and unit selection performed via physical button press sequences.
- Ultra-Low-Power (ULP) electronics architecture enabling up to 12 months of continuous data logging on a single set of AA lithium batteries (when used with optional DataLoggerXP module).
Sample Compatibility & Compliance
The XP2i-DP supports direct connection to liquid or gaseous media compatible with 316 SS and FKM seals—including compressed air, nitrogen, water, ethanol, IPA, and most non-aggressive HVAC and process fluids. It is not intended for use with halogenated solvents, hydrofluoric acid, or chlorine gas. The instrument meets ISO 9001:2015 manufacturing requirements and conforms to EN 60079-0, EN 60079-11, and EN 61326-1 (EMC for industrial environments). For regulated industries, its fixed calibration memory and tamper-evident seal support GLP/GMP traceability; optional NIST-traceable calibration certificates are available upon request.
Software & Data Management
The XP2i-DP operates autonomously without PC dependency. When equipped with the DataLoggerXP module, it captures timestamped differential pressure values at user-defined intervals (1 second to 24 hours), storing up to 32,000 records in non-volatile memory. Data export is accomplished via USB-C connection using Crystal’s free LogViewXP software (Windows/macOS), which generates CSV reports compliant with FDA 21 CFR Part 11 audit trail requirements—including operator ID, event timestamps, and modification history. No proprietary drivers or cloud services are required; all firmware updates and configuration changes are performed locally via signed binary files.
Applications
- Filter integrity testing in sterile pharmaceutical manufacturing (e.g., HEPA/ULPA pre-filters, bag-in/bag-out housings).
- Differential pressure monitoring across cleanroom pressure cascades (ISO 14644-1 classified spaces).
- Leak detection and flow verification in vacuum systems, gloveboxes, and inert gas purged enclosures.
- Performance validation of fume hoods, biosafety cabinets, and local exhaust ventilation (LEV) systems per EN 14175 and ANSI/AIHA Z9.5.
- Calibration reference for field-mounted DP transmitters in oil & gas, marine, and offshore platforms.
FAQ
Is the XP2i-DP suitable for sanitary or food-grade applications?
Yes—its smooth, crevice-free 316 SS wetted parts meet 3-A Sanitary Standards S3-A and EHEDG Doc. 8 requirements when paired with FDA-compliant FKM diaphragm seals.
Can it measure bidirectional differential pressure (i.e., negative and positive ΔP on the same scale)?
Yes—the display shows signed values (e.g., –2.45 kPa or +12.83 kPa) across the full span, with automatic zero retention during polarity reversal.
Does the device require annual recalibration?
While not mandatory, Crystal recommends verification against a certified standard every 12 months for GxP environments; built-in zero and span adjustment functions allow field recalibration using two known pressure points.
Is the DataLoggerXP module included by default?
No—it is an optional hardware add-on; base units operate as standalone gauges without logging capability.
What is the maximum allowable overpressure before damage occurs?
The sensor withstands 2× full-scale overpressure indefinitely and 5× full-scale for up to 1 minute without permanent shift, per IEC 61298-2.
