Overview of Honeywell Pressure and Differential Pressure Transmitters: Key Models and Features

Oct 28, 2025 by Jackwell

Honeywell Pressure Transmitter/Measurement Product Introduction

1. STD Series (e.g., STD924, STD930, STD974)

  • Part of Honeywell’s ST3000 SmartLine, it measures differential pressure for flow, level, or filter monitoring with ±0.075% full-scale accuracy and temperature/pressure compensation.
  • Features high stability (0.01%/year) and robust construction, supporting static pressures up to 42 MPa for harsh industrial environments like power plants and refineries.
  • Offers HART/DE/FF protocols for digital integration and modular design allowing field upgrades without recalibration.

2. STG Series (e.g., STG944, STG974, STG94L)

  • Designed for gauge pressure applications (0–100 psi to 0–21 MPa), it uses silicon-sensor technology with ±0.25% FSO accuracy and compatibility with non-corrosive gases/liquids.
  • Delivers long-term reliability in medical/HVAC systems, operating from -40°C to +125°C with options for 0-10V, I²C, or SPI outputs.
  • Includes self-diagnostics and dual-seal housing meeting ANSI/NFPA safety standards for explosive environments.

3. PX3 Series (e.g., PX3MT1BS700PSAAX)

  • A heavy-duty transmitter for refrigeration oils, hydraulic fluids, or brake systems in HVAC/R and transportation.
  • Integrates piezoresistive sensing with ASIC signal conditioning, ensuring high EMC resistance and minimal current consumption.
  • Pre-calibrated for -40°C to +125°C operation, featuring Metri-Pack connectors for quick installation in compressors or mobile machinery.

4. ST800 Series

  • Flagship differential pressure transmitter with 0.025% accuracy, 80ms response time, and 400:1 turndown for dynamic process control.
  • Equipped with graphical LCD displays (multilingual support) and health diagnostics to predict failures, reducing unplanned downtime.
  • Complies with APIMPMS 3.6/ISO 15169 for hybrid tank measurement and supports HART 7.0/Fieldbus protocols.

5. SmartLine STD700

  • Cost-effective DP transmitter using MEMS technology, achieving 0.0375% span accuracy with 10-year stability assurance.
  • Features dual-chamber sealing per ANSI/ISA 12.27.01 and modular electronics for easy field replacement.
  • Includes square root extraction for flow calculations and custom engineering units via HART/FF interfaces.