PRAI High-Temperature Pressure Transmitter TP18

The PRAI outputs 4–20 mA in two- or three-wire technology, optionally 0–5 V or 0–10 V. Designed for hot media: the medium can reach +150 °C, while the electronics remain at a maximum of +70 °C – separated by cooling fins between the process connection and the housing. The measuring body is a monolithic piece of 17-4 PH stainless steel, fully laser-welded and resin-potted. The price depends on the measuring range and sensitivity.

Nominal pressure selectable: relative 5, 10, 20, 50, 100, 250, 350, 500, 700, 1000, 1500, 2000 and 2500 bar (zero point at atmospheric pressure); the datasheet does not list an absolute version.

Technical Data

• Output: 4–20 mA (2- or 3-wire) · 0–5 V · 0–10 V. Linearity and hysteresis ≤ ±0.20 %, calibration tolerance ≤ ±0.1 %.

• Temperature influence: zero point ≤ ±0.015 %/°C, characteristic value ≤ ±0.015 %/°C. Zero point adjustment ±10 %, adjustable internally under the nut.

• Response frequency: 0.5 to 5 kHz.

• Supply: 12–24 V DC (4–20 mA and 0–5 V), 15–24 V DC (0–10 V), maximum 28 V DC. Current consumption maximum 30 mA (3-wire) or 20 mA (2-wire).

• Connection: M12×1 connector with molded shielded PVC cable, Ø 5.2 mm, 4 × 0.34 mm², 3 m. The source only shows the three-wire assignment.

• Temperature: medium -10 … +150 °C, ambient -10 … +70 °C, storage -20 … +80 °C · Protection class IP65 according to EN 60529.

• Process connection: G 1/4″, G 1/2″ or BSP male thread; the four highest ranges have G 1/2″. Tightening torque SW 27 with 28 N·m. Seat diameter ØF 6 mm up to 10 bar, 7.2 mm from 20 bar.

• Dimensions: Ø 25 mm, total length approx. 122 mm, housing 96 mm.

• Pressure limits: permanent 100 %, permissible 150 %, burst > 300 %, highly dynamic 75 % of nominal pressure.

Application and Conformity

Hot media in process plants, steam and thermal oil circuits, injection molding and extrusion – wherever the medium is hotter than a conventional sensor allows. CE, RoHS and REACH; EN 61326-1 and EN 61010-1; quality system according to EN ISO 9001.

On request: calibration certificate. As an option, food contact according to (EC) 1935/2004 and (EC) 2023/2006 (GMP) for versions from 20 bar, material 17-4 PH (WN 1.4542).