🔎 What Are Pressure Transmitters?
Pressure transmitters are instrumentation devices that measure liquid and gas pressure in industrial processes and transmit reliable signals (4–20 mA, HART, Profibus, Foundation Fieldbus) to control and automation systems.
In petrochemical plants, differential pressure transmitters for filter ΔP monitoring are critical; in power plants, absolute pressure transmitters for boiler safety are widely used; in food & beverage, hygienic gauge pressure transmitters for CIP/SIP processes ensure compliance; and in water treatment, ABB PGS gauge pressure transmitters for pipeline monitoring are common. Heavy industry applications often rely on ABB 266 differential pressure transmitters for steam boiler ΔP measurement.
The most widely adopted product families include:
- Emerson Rosemount 3051 pressure transmitters
- ABB 266, ABB 2600T, and ABB PGS series
- Yokogawa EJA / EJX pressure transmitters
- Siemens SITRANS P (DS, PT, P300/P310)
Yeşil Grup Enerji provides multi‑brand, project‑based sourcing without authorized distributor dependency, offering fast RFQ, technical validation, and alternative product support to global markets.
🧭 Pressure Transmitter Types
🔀 Differential Pressure (DP)
Measures the pressure difference (ΔP) between two points. Used for filter clogging detection, heat exchanger performance, orifice/venturi flow measurement, and hydrostatic level monitoring.
- Typical range: 0–2000 mbar ΔP
- Materials: SS316, Hastelloy
- Output/Protocol: 4–20 mA + HART, Fieldbus
- Connection: ½” NPT, capillary seal
- Organic long‑tail: Rosemount 3051DP differential pressure transmitter for filter ΔP monitoring, ABB 266DS differential pressure transmitter for boiler ΔP measurement
⚙️ Gauge Pressure (GP)
Measures pressure relative to atmospheric pressure. Ideal for pump and compressor lines, CIP/SIP processes, and general line monitoring.
- Typical range: 0–250 bar
- Materials: SS316, Monel
- Output/Protocol: 4–20 mA + HART, Profibus
- Connection: G½, ½” NPT
- Organic long‑tail: Emerson Rosemount 3051CG compact gauge pressure transmitter for skid applications, ABB PGS100 gauge pressure transmitter for water treatment pipelines
🌡️ Absolute Pressure (AP)
Measures pressure relative to a perfect vacuum. Suitable for vacuum systems, distillation columns, and processes requiring barometric reference.
- Typical range: 0–10 bar abs
- Materials: SS316, Hastelloy
- Output/Protocol: 4–20 mA + HART, Profibus
- Connection: Flanged, threaded
- Organic long‑tail: Rosemount 3051AP absolute pressure transmitter for vacuum lines, Yokogawa EJX‑AP absolute pressure transmitter for low‑pressure accuracy
⚖️ Comparison of Measurement Types
| Type | What It Measures | Typical Application | Strength | Key Consideration |
| Differential (DP) | ΔP between two points | Filter, flow, level | Clear trend, maintenance optimization | Capillary & temperature compensation |
| Gauge (GP) | Pressure vs atmosphere | Pumps, compressors, CIP | Simple installation, compact options | Vibration & installation space |
| Absolute (AP) | Pressure vs vacuum | Vacuum systems | High accuracy at low ranges | Diaphragm & material selection |
🧠 How to Select the Right Pressure Transmitter
Selection criteria:
- Measurement type (DP, GP, AP)
- Pressure range (mbar – 1000 bar)
- Process connection (½” NPT, G½, flange, Tri‑Clamp)
- Process fluid, temperature, corrosion level
- Communication protocol (HART, Profibus, Profinet, FF)
Application examples:
- Filter ΔP monitoring → Emerson Rosemount 3051DP differential pressure transmitter, ABB 266DS differential pressure transmitter
- Hygienic processes → Siemens SITRANS P300 hygienic gauge pressure transmitter, ABB PGS100 gauge pressure transmitter
- Vacuum & low pressure → Yokogawa EJX‑AP absolute pressure transmitter
🏷️ Brand & Model Breakdown
Emerson Rosemount 3051 Series
- 3051CG: 0–250 bar; SS316/Hastelloy; HART; ½” NPT
- 3051TG: 0–400 bar; SS316/Monel; Profibus/Fieldbus
- 3051AP: 0–10 bar abs; HART; flanged
- 3051DP: 0–1000 mbar ΔP; HART/Fieldbus; capillary
- 3051S: 0–700 bar; HART/Profibus/Profinet
Yokogawa EJA / EJX Series
- EJA/EJX‑DP: 0–2000 mbar ΔP
- EJA‑GP: 0–250 bar
- EJA‑AP: 0–10 bar abs
Siemens SITRANS P Series
- DS / PT / PA: 0–400 bar
- P300 / P310: 0–160 bar; hygienic; Tri‑Clamp
ABB Pressure Transmitters
- ABB 2600T (261/264/268): 0–600 bar
- ABB 266 (DS/GST/HST): 0–400 bar
- ABB 265: 0–250 bar; compact
- ABB 268: 0–1000 bar
- ABB PGS100 / PGS200: 0–160 bar; hygienic
🌍 Global Supply & RFQ
Yeşil Grup Enerji offers:
- 🌍 Fast supply from global stock
- ✅ Full product code validation
- 📄 Datasheet & alternative product comparison
- 🔄 Project‑based competitive quotations
⚠️ Important Note
Yeşil Grup Enerji is an independent supplier and not an authorized distributor of the mentioned brands. With a multi‑brand sourcing approach, we provide the most suitable technical and commercial solutions for your projects.
📧 Contact
- Email: info@yesilgrupenerji.com
- Phone: +90 505 696 61 00
- Web: www.yesilgrupenerji.com
