Dew point meters

PDP Check 500 S2/S1

The PDP Check 500 S2/S1 is a high-precision dew point meter designed for refrigeration, membrane, and adsorption dryers. With an integrated display, alarm relay, and Modbus-RTU interface, it provides real-time monitoring and alerts, ensuring dry, high-quality air and system efficiency.

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Real-Time Monitoring

Integrated display and alerts

The PDP Check 500 S2/S1 features a built-in display and alarm relay, allowing users to set thresholds and receive instant alerts if moisture levels exceed safe limits.

Fast & Stable

Quick response & long-term accuracy

With a fast adaptation time and stable sensor performance, it delivers precise, real-time dew point readings, ensuring reliable moisture control.

Key Specs

Flexible connectivity & high pressure resistance

Equipped with Modbus-RTU, 4-20 mA output, and pressure resistance up to 500 bar (special version), it seamlessly integrates into compressed air and gas monitoring systems.

PDP Check 500 S2/S1 Dew Point Meters

Excess moisture in compressed air and gas systems can lead to equipment damage, inefficiencies, and costly downtime. The PDP Check 500 S2/S1 helps prevent these issues by monitoring dew point levels and alerting users when moisture levels become too high.
 

With a clear display and built-in alarm, it provides instant feedback, making it easy to take action when needed. Its fast response ensures stable readings, and it integrates smoothly into existing systems. Designed for demanding environments, it offers reliable moisture control across a range of applications, from compressed air drying to gas processing.

PDP Check 500 dew point sensor action view

Why dew point monitoring matters

Excess moisture in compressed air and gas systems can lead to corrosion, equipment damage, and reduced efficiency. Monitoring the dew point helps prevent these issues by ensuring air remains dry and system performance stays reliable.cThe PDP Check 500 S2/S1 provides accurate, real-time moisture measurement, making it easy to detect and control humidity levels. With integrated alerts and seamless system integration, it offers a practical and effective solution for maintaining dry, high-quality air in compressed air and gas applications.

Discover the key features of the PDP Check 500 S2/S1

The PDP Check 500 S2/S1 delivers accurate dew point measurement with a fast response time and long-term stability, ensuring reliable moisture monitoring. It features an integrated display and alarm relay, allowing users to set thresholds and receive instant alerts. With Modbus-RTU and 4-20 mA output, it seamlessly integrates into monitoring systems. Built for demanding applications, it offers pressure resistance up to 500 bar (special version), making it suitable for high-pressure environments in compressed air and gas systems.

Reliable tools to track performance, improve efficiency, and reduce costs

Protecting your compressed air system while ensuring precise performance has never been easier. High-quality measurement equipment provides accurate monitoring of critical parameters, helping you optimise efficiency, maintain reliability, and prevent costly issues. Engineered for durability and seamless integration, these solutions empower you to make informed decisions and keep your operations running at peak performance. Contact us today to explore how upgrading your measurement equipment can enhance your system's capabilities and operational success.

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General specifications

Technical specifications PDP Check 500 S2/S1

Measuring range

-80…20 °Ctd, 
-20…50 °Ctd, or
 0…100% RH

Accuracy

± 1 °C at +50…-20 °Ctd
± 2 °C at -20…-50 °Ctd
± 3 °C at -50…-80 °Ctd

Pressure range

-1…50 bar
Special version up to 500 bar

Power supply

24 VDC (10…36 VDC)

Protection class

IP 65

EMC

In acc. with DIN EN 61326-1

Operating temperature

-20…50 °C

Connection

2 x M12, 5-pin for analogue output, Modbus-RTU and alarm output, M-Bus (optional) Ethernet (PoE) (optional)

PC connection

Modbus-RTU interface (RS 485)

Output (3-wire)

4…20 mA = -80…20 °Ctd
4…20 mA = -60…30 °Ctd
4…20 mA = -20…50 °Ctd

Burden for analogue output

< 500 Ω

Alarm relay

NC, max. 60 VDC, 0.5 A

Screw-in thread

G 1/2″

Dimensional housings

76.5 x 85 x 75 mm  (WxHxD)

  • Integrated display
  • Threshold value adjustable via keypad, alarm relay (max. 60 VDC, 0.5 A)
  • Pressure-tight up to 500 bar (special version)
  • Extremely stable in the long term 
  • Quick adaptation time 
  • 4...20 mA analogue output for dew point 
  • Different refrigeration and adsorption dryer versions 
  • Modbus-RTU interface 
  • Higher resolution of sensor signal due to the improved evaluation electronics 
  • Sensor diagnosis on site with a portable device or PMH Service Software

  • Ethernet interface (PoE)

Get in touch

Have questions about our measurement equipment or want to learn how it can elevate your operations? Contact us today! Our team is here to provide expert advice and guide you in optimising your processes with our accurate and dependable solutions. Let’s ensure precision and take your system’s performance to the next level!

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