PPL21 compact temperature transmitter with process connection

PPL20 Plug In Display

PPL20 M12 Connector

PPL21-TX Compact Temperature Transmitter with Process Connection

Our PPL20 series of sensors are evolutions of the traditional temperature probe designs. They are designed to offer the end user a compact design that is easy to use and maintain. The sensor is built around a single piece fabricated stainless steel housing which houses both the sensor and transmitter board. The customer interfaces with the unit via an industry standard DIN43650 or M12 connector. The clean lines and superb build quality make it ideal for use in applications where hygiene is important. Traditional terminal heads are clumsy and offer lots of potential dirt traps. Our PPL20 series avoids this.

Our PPL21-TX temperature sensor has a plain stem plus fixed male process connection thread below the transmitter body. It is suitable for the measurement of liquids and gases across a wide temperature range. All sensors are made to order so it is generally possible to meet all of your requirements.

The complete stem of the probe and housing is made from 316 stainless steel and is TIG welded closed to give a high quality single piece product. Many metric and imperial probe diameters are available from 3mm upwards, however we recommend diameter of 4.5mm upwards to provide sufficient support to the housing. Thread types are supplied as per our customers requirements and are generally BSP, BSPT or NPT types but we can also supply others such as Metric threads, UNF, UNC etc.

Built in is a 4-20mA output temperature transmitter that is loop powered. We can configure the unit to any temperature range you require, or we can supply a USB interface and PC software that makes this easy on site.

The PPL21-TX is ideal for use with compression fittings or our PPL51-TW pocket making them easy to install in your process.

We offer a comprehensive calibration service and a wide choice of accessories.


Compact Temperature Transmitter with Process Thread
Welded Process Connection for Easy Installation
4-20mA Output
Clean Simple Design
Ideal for use in Food, Beverage and Dairy Industries
Choice of Stainless Steel Sheath & Body Sizes
IP65 or IP67 Connector Options
UKAS or Traceable Calibration Available.

General Specifications

Sensor Type: Platinum Resistance Thermometer—Pt100, 3 wire
Output: 4-20mA, 2 wire.
Power Supply: 10-30V d.c. Loop Powered.
Operating Range of Sensor: 0 to +100°C.
Ambient Temperature: 0 to +70°C (for transmitter housing)
Sheath/Housing Material: 316 stainless steel
Sensor Tolerance Band: Class B, Class A, 1/3 DIN, 1/5 DIN or 1/10 DIN
Transmitter Accuracy: ±0.1°C ±0.05% of Reading
Connector Types: A—DIN43650 IP65 (as shown in photo) B—M12 IP67
Head Options: A – Ceramic Terminal Block B – In Head Transmitter—various types C – Tails for Customers Own Transmitter

Probe Drawing

PPL21 drawing

Part Number System

PPL21-TX part numbering