·Level
STF724
The Honeywell SmartLine® STF700 and STF800 series are piezoresistive flange-mounted level transmitters engineered for tank level monitoring, control, and data acquisition. With on-chip temperature compensation, dual-seal safety design, and 10-year stability up to 0.01% of URL/year, they directly mount onto tank flanges with a variety of flush and extended diaphragm configurations.
Key Benefits
- 01Accuracies up to 0.0375% standard and 0.025% option (STF800)
- 0210-year stability up to 0.01% of URL per year (STF800)
- 03Automatic static pressure and temperature compensation on-chip
- 04Integral dual-seal design (ANSI/NFPA 70-202, ANSI/ISA 12.27.0) for highest safety
- 05Modular design — meter bodies, indicators, and electronics swappable without recalibration
Technical Features
- 01Models: STF724, STF725, STF728, STF732, STF73F, STF800, STF828, and related flange-mounted variants
- 02Piezoresistive sensor with on-chip static pressure and temperature compensation
- 03Span limits: up to 400 inH₂O (1000 mbar) differential, up to 100 psi (7 bar) gauge
- 04Rangeability up to 100:1
- 05Response time as fast as 90 ms
- 06Accuracy up to 0.05% standard (STF700), 0.0375% (STF800), 0.025% option (STF800)
- 07Stability up to 0.02%/year (STF700) or 0.01%/year (STF800) of URL for 10 years
- 08Communications: 4–20 mA DC, Honeywell Digitally Enhanced (DE), HART 7.0, FOUNDATION™ Fieldbus
- 09SIL 2/3 compliant
- 10World-class overpressure protection
- 11Polarity-insensitive electrical connections
- 12External zero, span, and configuration via 3-button access
- 13Multiple local display options: basic alphanumeric or modular advanced LCD
- 14Display rotation: 0°, 90°, 180°, 270° positions
- 15Plugged Impulse Line Detection option (STF800, HART/Fieldbus)
- 16Dual/Triple Calibration option (STF800, HART/Fieldbus)
- 1715-year warranty option available (STF800)
- 18Comprehensive digitally accessible diagnostics
- 19MCT404 handheld configurator support; SCT 3000 and FDM PC configuration
Applications
- Tank level measurement with direct flange mounting
- Process vessels requiring flush or extended diaphragm connections
- Hygienic and sanitary process tanks
- Viscous, slurry, or crystallizing process fluids
- Safety-critical level loops (SIL 2/3)
- Long-term stability-driven applications (10-year warranted drift)
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