Hart models 1.48 represents a precision-engineered series favored by engineers and technicians who demand tight tolerances and repeatable performance. This overview covers core design goals, typical materials, and the operational environment where these models excel.
Below is a structured snapshot of Hart models 1.48 capabilities, intended certifications, and key application scenarios to guide initial selection.
| Model Variant | Key Specification | Intended Certification | Typical Application |
|---|---|---|---|
| 1.48-A | 0.5% accuracy, 0…250 psi | ISO 9001 | Laboratory calibration |
| 1.48-B | 0.25% accuracy, 0…500 psi | ASME B40.100 | Process control lines |
| 1.48-C | 0.1% accuracy, 0…1000 psi | Traceable NIST | High reliability safety systems |
| 1.48-D | 0.25% accuracy, -50…150 °C | ATEX/IECEx | Hazardous area monitoring |
Pressure Range and Operating Conditions
Span and Overload Protection
Hart models 1.48 cover a wide pressure span, with models rated from vacuum to 1000 psi full scale. Each model includes built-in overload protection to prevent sensor damage during pressure spikes, ensuring stable readings across transient events.
Temperature Compensation
Advanced temperature compensation keeps error bands tight from -50 °C to +150 °C. Engineers benefit from reduced drift when installations experience ambient cycling or localized heating from nearby equipment.
Accuracy, Calibration, and Traceability
Accuracy Classes and Repeatability
Accuracy options range from 0.1% to 0.5% of reading, depending on variant. Enhanced repeatability minimizes scatter in automated test benches, reducing the need for frequent recalibration and lowering lifecycle cost.
Calibration Certificates and Standards
Available calibration certificates reference ISO 9001, ASME B40.100, and NIST traceability. Clear documentation simplifies compliance audits and supports quality management systems across production and service teams.
Installation, Integration, and Environmental Protection
Mechanical Integration and Compatibility
Standardized port sizes and thread options enable direct integration with existing manifolds and manifolds. Hart models 1.48 supports multiple electrical output signals, easing compatibility with PLCs, SCADA, and distributed control systems.
Environmental Rating and Protection
Many variants feature robust sealing with IP67 or higher protection levels. For hazardous locations, select models comply with ATEX and IECEx directives, ensuring safe operation in explosive atmospheres.
Key Takeaways and Recommendations
- Match pressure range and accuracy class to the specific process requirement to avoid overspecification.
- Verify environmental and certification requirements, such as IP rating and ATEX/IECEx, before installation.
- Use included calibration certificates to streamline qualification and audit processes.
- Plan periodic verification schedules to maintain long-term performance and traceability.
FAQ
Reader questions
What pressure range is available for Hart models 1.48?
Hart models 1.48 are offered from vacuum ratings up to 1000 psi full scale, with select models optimized for low-pressure and high-vacuum applications.
Do Hart models 1.48 support digital communication protocols?
Certain variants include digital outputs and communication options that allow direct integration with industrial networks and data logging platforms.
Can these models be used in explosive atmospheres?
Yes, specific variants are designed and certified for use in hazardous areas with appropriate ATEX or IECEx compliance.
What is the expected lifespan under normal operating conditions?
With proper installation and periodic calibration, Hart models 1.48 typically deliver many years of reliable service, supported by documented longevity testing.