1/4 BSP Pressure transmitter 0-2.5/10/40/100 Bar 4-20mA

Description

The Connexion CNXPT pressure transmitter adopts the HT series diffusion silicon isolation oil-filled core as the signal measuring element.

The signal processing circuit is located inside a stainless steel housing, converting the sensor signal into a standard output signal.
The product has undergone rigorous testing and ageing screening for components, semifinished products, and finished products, ensuring stable and reliable performance.
Product Features：
Wide measurement range, stainless steel structure, Various pressure interface options
Diverse output signal options
Adjustable zero and full-scale
High accuracy
Each unit is supplied with test certificate

Applications：
Suitable for measuring non-corrosive gases and liquids with 316L
Applied in industrial on-site processes such as petroleum, chemical, metallurgy, power generation, and hydrology
Used in the marine and aviation industries
Suitable for hydraulic and pneumatic control systems

Port: 1/4 BSP (G) male thread
Output signal: 4-20mA
Supply voltage: 12-30vDC
Output type: 3 terminals (DIN43650A Hirschman plug)

Measurement Range: -1 Bar…0 Bar ～ 0.1 Bar…1000 Bar
Pressure Type: Gauge Pressure (35 Bar Max), Absolute Pressure, Sealed Pressure
Overload: ≤ 1.5 times of the rated range
Accuracy @ 25℃: ±0.25% (Typical) ±0.5% (Maximum)
Repeatability & Hysteresis: 0.02%F.S (Type) 0.05%F.S(Max.)
Long-Term Stability: ±0.1%F.S/Year（Type） ±0.2%F.S/Year（Max.）
Zero Point Temperature Drift: ±0.02%F.S/℃（≤100KPa） ±0.01%F.S/℃（＞100KPa）
Full Scale Temperature Drift: ±0.02%F.S/℃（≤100KPa） ±0.01%F.S/℃（＞100KPa）
Compensation Temperature: 0-70℃（≤10mpa，customizable）
Operating Temperature: -20℃~80℃
Storage Temperature: -40℃~120℃
Vibration: 10g，55Hz ～ 2kHz
Housing Material: 316L
Diaphragm Material: 316L
Insulation Resistance: 100MΩ 100VDC
Explosion-proof Rating: Ex db IIC T6 Gb
Protection Rating: IP65
O-Ring Seal: Fluoro rubber
Weight: ~0.2kg

The difference between Gauge and Sealed pressure transmitters lies in what reference pressure they use to measure pressure.

1. Gauge Pressure (G or GP)
Measures pressure relative to atmospheric pressure.
Zero gauge pressure means it's equal to the current atmospheric pressure.
Most common in everyday applications (e.g. car tires, water pumps).
Example:
If a tire reads 35 psi (gauge), the actual pressure is 35 psi above atmospheric pressure (~14.7 psi at sea level).
So the absolute pressure is 35 + 14.7 = 49.7 psi.
Used when atmospheric pressure changes aren’t critical to your process.

2. Sealed Gauge Pressure (SG or SGauge)
Measures pressure relative to a fixed (sealed) atmospheric pressure — usually sealed at 1 atm (14.7 psi).
Works like gauge pressure but doesn’t adjust with changes in local atmosphere (like elevation or weather).
Example:
You bring a sealed gauge transmitter from sea level to a mountain. It still assumes 1 atm = 14.7 psi, even though the actual atmosphere might be lower.
Used in environments where atmospheric pressure is not consistent but doesn't need absolute accuracy (like remote sites).

Technical Specification