STD725

🧪 What This Data Means — For Quick Client Selection

✔ High accuracy for critical tanks

±0.065% accuracy ensures precise hydrostatic level measurement in reactors, chemical dosing tanks, and pharma vessels.

✔ Works for pressurized and closed tanks

Since it is a DP transmitter, it correctly compensates vapour pressure — crucial for boilers, chemical tanks, and pressure vessels.

✔ Extreme stability (10-year drift guarantee)

Clients get long-term reliability with minimal recalibration—ideal for continuous process plants.

✔ Multiple materials (SS316L/Hastelloy)

Suitable for corrosive chemicals, solvents, and high-purity fluids.

✔ SIL2/3 certified

Meets global safety standards — preferred in oil & gas, pharma, chemical manufacturing where safety loops are mandatory.

✔ Flexible turndown (100:1)

Allows one transmitter to cover multiple tank ranges → reduces inventory and cost.

✔ Compatible with manifolds + impulse lines

Supports wet leg, dry leg, capillary, and remote seal arrangements for all industrial tank types.

Description

Honeywell STD725 is a high-accuracy SmartLine differential pressure transmitter designed for precise hydrostatic level measurement in pressurized and atmospheric tanks. With advanced stability, SIL2/3 safety certifications, digital diagnostics, and multiple communication options, it ensures reliable level monitoring in chemical, pharma, oil & gas, utilities, and process tanks.

🔧 STD725 — Key Technical Data & Selection Parameters

Parameter Specification / Details
Measurement Principle DP measurement → hydrostatic level (H = ΔP / ρ·g)
Sensor Technology Piezo-resistive + SmartLine electronics
Measuring Range Up to 0–210 mbar … 0–210 bar depending on range code
Accuracy Up to ±0.065% of span
Long-term Stability ±0.02% of URL per year (10 years)
Output 4–20 mA + HART (Optional: Fieldbus/DE)
Display Backlit LCD with diagnostics
Wetted Materials SS316L, Hastelloy, Monel (as per order)
Process Connections 1/2″ NPT, flanged, manifold-mounted
Turndown 100:1
Temperature Limits –40 °C to +120 °C (process)
Overpressure Protection Up to 41 MPa (per range)
Safety Certifications SIL2/3 compliant
Enclosure IP66 / IP67 / NEMA 4X
Suitable Media Liquids, chemicals, solvents, utilities
Typical Level Application Pressurized tanks, atmospheric tanks, reactors, balance tanks, chemical dosing tanks

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