STD 725

STD 725

 What This Data Means — For Quick Client Selection

  • Preferred DP transmitter where flow is derived via orifice/venturi/pitot → accurate & stable over years.
  • Choose for steam boiler level + drum DP due to high temperature + stability.
  • Manifold-ready design simplifies integration with 3-/5-valve manifolds in refineries & power plants.
  • Corrosive lines? pick Hastelloy/Monel wetted parts for acids/brine/chlorides.
  • SIL-certified → suitable for shutdown loops, high-risk DP monitoring, flare headers & ESD logic.
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Description

Honeywell STD725 is a high-performance DP transmitter designed for flow, level, filter monitoring and steam/chemical process differential pressure control. With ±0.065% accuracy, long-term stability, SIL safety approvals and diagnostics, it is ideal for ETP, refinery, power, boiler DP, condensate & ammonia/chemical lines.

STD725 — Key Technical Data & Selection Parameters

Parameter Specification / Details
Measurement Principle Differential pressure, piezoresistive + digital compensation
Accuracy ±0.065% of span
Long-Term Stability 0.02% URL / year up to 10 years
DP Ranges 0–0.04 bar to 0–200 bar DP
Turn Down Ratio 100:1
Output 4–20 mA + HART (FF/Profibus optional)
Response Time ≤ 100 ms adjustable
Display Backlit LCD, local keys, diagnostic icons
Safety Compliance SIL2 / SIL3 (per IEC61508)
Ingress Protection IP66 / IP67
Process Temperature –40 °C to +120 °C (with seals)
Process Connections ½” NPT, manifold-ready, flange
Material Options SS316L, Hastelloy C, Monel
Diagnostics Plugged impulse detection, sensor drift alert, loop integrity

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