Honeywell SmartLine® STD800 Differential Pressure Transmitter
The Honeywell SmartLine® STD800 is a high-performance differential pressure transmitter designed for precise measurement of gases, liquids, and vapors. Part of the ST800 pressure family, this instrument excels in flow rate measurement (via orifice plate/venturi), level monitoring (closed/open tanks), and filter differential pressure applications across demanding industrial environments.
Core Applications & Industries
This differential pressure transmitter serves critical measurement functions in petrochemical, power generation, metallurgy, paper manufacturing, pharmaceutical, and water treatment industries.
Technical Specifications
Measurement Performance
- Accuracy: Maximum ±0.025% of Range (URL)
- Range Ratio: Up to 400:1 (STD820/830/870 models)
- Long-Term Stability: ±0.01% URL/year with 15-year warranty
- Response Time: 90ms (typical)
- Static Pressure Influence: Automatic compensation reduces high-pressure errors
- Overpressure Protection: Up to 210 bar protection against shock damage
Measuring Range by Model
| Model |
Differential Pressure Range |
Range Ratio |
Accuracy |
| STD810 |
-10inH₂O ~ +10inH₂O (-25mbar ~ +25mbar) |
100:1 |
0.015% |
| STD815 |
-100inH₂O ~ +100inH₂O (-250mbar ~ +250mbar) |
200:1 |
0.020% |
| STD820/825/830/870 |
0.1bar ~ 210bar |
400:1 |
0.025% |
Note: Units can be switched between inH₂O, mbar, kPa, psi, bar, etc.
Electrical & Communication
- Power Supply: 24VDC two-wire with reverse polarity protection
- Output: 4–20mA HART (standard); optional Foundation Fieldbus, WirelessHART
- Display: Multi-window LCD (optional) with field button configuration
- NAMUR NE43: Fault Mode ≤3.6mA (low) or ≥21.0mA (high)
Environmental & Installation
- Operating Temperature: -40°C ~ +85°C (electronics); -40°C ~ +121°C (process connection)
- Protection Rating: IP66/IP67 with explosion-proof certifications (ATEX/IECEx/CSA)
- Process Connection: 1/2" NPT internal thread, flange, direct mounting, remote sealing options
- Structure: Modular design allowing on-site component replacement without affecting certification
Key Features & Advantages
- Advanced Diagnostics: Built-in pressure line blockage detection, sensor health monitoring, and process anomaly warnings
- Multiple Calibration Options: Supports 1/2/3 sets of factory calibrations with one-click on-site range switching
- Safety & Compliance: SIL 2/3 functional safety certification with dual sealing and ANSI/NFPA/ISA standards compliance
- System Integration: Deep compatibility with Honeywell Experion PKS for plug-and-play operation
- Extreme Conditions: Wide temperature range operation with remote sealing options for corrosive media isolation