Precise pressure monitoring with Fluid.iO
according to the Pressure Equipment Directive
PED 2014/68/EU Electronic pressure monitors, pressure limiters, and safety pressure limiters
ES-2X: Product family of electronic safety switching devices
The products in the ES family are electronic safety switching devices for pressure monitoring with comprehensive self-diagnostic functions and a fail-safe design. The devices meet the highest safety standards, can be flexibly expanded, and wirelessly configured using a smartphone.
The ES series offers excellent safety features and useful expert functions. Save resources during planning, commissioning, daily operation, and maintenance of your system thanks to intelligent convenience functions.
Security features at a glance

Pressure switch (PSH/DWK)
Setting a switching point and a reset point (hysteresis) The device is automatically reset or unlocked.

Pressure limiter (PZH/DBK)
Setting a switching point. Resetting and unlocking is done manually on the device (without tools).

Safety pressure limiter (PZHH/SDBK)
Setting a switching point
Resetting and unlocking is done manually with a tool directly on the device.

- DGRL 2014/68/EU
- DIN EN 378
- SIL2
ES series: electronic pressure switches / pressure limiters
Type-tested & TÜV-certified electronic safety switching device
By using our safety switching device, you can avoid unwanted overpressure or underpressure in your process flow and, in the event of a fault, quickly and safely shut down the source of danger. This ensures a safe condition for people, machines, and the environment at all times.
Overview of expert and comfort functions
- Bluetooth
- Android App
Easy integration & fastest commissioning
By using the ES series, you reduce time-consuming, labor-intensive commissioning and device testing for safety-relevant components. Configuration and functional testing of sensors and switching relays can be performed quickly and precisely via an Android app. This eliminates the need for a gradual increase in system pressure.
Alarm, test, and setting logs can then be wirelessly transferred in PDF format from the device to your smartphone.
System diagnostics, leak testing, and measurement data acquisition can be performed in a single step using the ES series' service functions.
ES Series: Devices, Extensions & Software
Refrigerants (ammonia, propane, CO2) Hyrogen Steam Boiler Water vapor Hot water
ES-20
Pressure limiter | Pressure monitor | Safety pressure limiter | Pressure regulatorelectronic safety switching device
Relativdruck Differenzdruck
Simple and precise setting of switching thresholds, reset values and delay times
suitable for : gas
Features : DGRL 2014/68/EU SIL2 Wasserstoff
ES-21
Electronic safety switching device with 1 safety function
Relativdruck Differenzdruck
Simple and precise setting of switching thresholds, reset values and delay times
suitable for : gas
Features : DGRL 2014/68/EU SIL2 Wasserstoff
ES-22
Limitador de presión de seguridad electrónico con 2 funciones de seguridad
Relativdruck Differenzdruck
Simple and precise setting of switching thresholds, reset values and delay times
suitable for : gas
Features : DGRL 2014/68/EU SIL2 Wasserstoff
ESE
Switching channel extension for ES series
Relativdruck Differenzdruck
Simple and precise setting of switching thresholds, reset values and delay times
suitable for : gas
Features : DGRL 2014/68/EU SIL2 Wasserstoff
Smart Pressostat App
App for control of ES-2X devices over Bluetooth
Absolutdruck Relativdruck Differenzdruck
simple operation of our electronic pressure limiters, pressure monitors and safety pressure limiters
suitable for : fluids gas
Features : DGRL 2014/68/EU Android
ZT-S
Functionally safe pressure transmitter for ES series
Relativdruck
Pressure ranges from -1 to 4,000 bar
suitable for : gas fluids
Features : SIL2
ESE
Switching channel extension for ES series
Relativdruck Differenzdruck
Simple and precise setting of switching thresholds, reset values and delay times
suitable for : gas
Features : DGRL 2014/68/EU SIL2 Wasserstoff
The functions of the ES series save effort and time in many applications,
Refrigeration systems Heat Pump Steam boiler combustion systems Filter systems compressor Compressor
Fluid.iO ES-Series
pressure regulator
Leak test of your system
- facilitates commissioning and regular testing of the system
- Fulfillment of documentation requirements by retrieving the test report with time stamp directly from the device
Fluid.iO ES-Series
pressure limiter
integrated pressure transmiter
- Relative or differential pressure measurement
- 4...20mA measured value or alarm output
- SIL-2
Fluid.iO ES-Series
pressure switch
Switching device for pressure limitation
- Type-tested according to PED 2014/68/EU
- according to DIN EN 378
- Electronically configurable pressure switch (DWK), pressure limiter (DBK) & safety pressure limiter (SDBK) available as a combination in one device
- Limitation to rising or falling pressure
Fluid.iO ES-Series
Safety pressure limiter
Pressure display & data logging
- Read pressure value, switching thresholds and other parameters directly on the display
- Display of live measurement data on the smartphone
- Pressure and temperature measurement at the process connection
- Storage of the measurement series in the device and transmission to a connected smartphone
- pressure limiter
- Pressure switch
- Safety pressure limiter (SDBK)
Flexible expansion of the measuring and switching channels
The devices of the ES series are designed for increasing (maximum pressure limiter) or decreasing pressure (minimum pressure limiter) depending on the application.
The ES series can be expanded into a central measurement and control system using measuring channel and switching channel extensions. For this purpose, specially developed SIL 2-capable pressure transmitters (ZT-S) are connected to the ES device via a secure communication interface. This enables simultaneous monitoring of up to four pressure circuits.
- Comissioning
- Parameterization
Advanced parameterization for easy monitoring of system pressure
The operating concept is based on the VDMA menu structure, which further simplifies device operation.
Use the two control buttons to quickly navigate through the extensive configuration menu to precisely adjust switching points, switching delays, hysteresis, and many other parameters. Switching points can be set to an accuracy of 0.1 bar across the entire nominal pressure range. The device saves your settings digitally. Alternatively, you can conveniently configure the ES-2x device using a smartphone app via Bluetooth.
Pressure switches & pressure limiters: Frequently asked questions & answers
ES-Serie from Fluid.iO
The devices of the ES-2x series are electronic safety switching devices for pressure monitoring with comprehensive self-diagnostic functions and fail-safe design. The devices are used as pressure regulators, for minimum or maximum pressure limitation on compressors in refrigeration and air conditioning systems, on heat pumps, steam boiler systems and on hydraulic systems. With the exception of the integrated switching relays, there are no mechanically moving components, resulting in high vibration resistance and a long service life. The switching limits can be conveniently set and precisely monitored. Comprehensive self-diagnostic and logging functions ensure safe monitoring and fast shutdown of the source of danger as well as high traceability of events that have occurred.
Merkmal | ES-20 | ES-21 | ES-22 |
---|---|---|---|
Zertifizierungen | |||
SIL-2 | ✔ | ✔ | ✔ |
DGRL 2014/68/EU | ✘ | ✔ | ✔ |
Sicherheitsfunktionen | |||
Anzahl | wählbar | 1 | 2 |
Druckregler | ✔ | ✘ | ✘ |
Druckwächter | ✔ | ✔ | ✔ |
Druckbegrenzer | ✔ | ✔ | ✔ |
Sicherheitsdruckbegrenzer | ✔ | ✘ | ✔ |
Messprinzip | |||
Relativ- bzw. Absolutdruck | ✔ | ✔ | ✔ |
Differenzdruck | ✔ | ✘ | ✘ |
Komfortfunktionen | |||
App-Kommunikation | ✔ | ✔ | ✔ |
4..20mA Signalausgang | ✔ | ✔ | ✔ |
Messkanalerweiterung | ✔ | ✘ | ✔ |
Schaltkanalerweiterung | ✔ | ✘ | ✔ |
Alarmausgang | ✔ | ✔ | ✔ |
Fernentriegelung | ✔ | ✔ | ✔ |
Properties
- Operating voltage
- 16...32 V DC (max. 5,9 W)
- Dimensions
- 150 x 60 x 42 mm (L x B x H)
- Housing
- Aluminium (eloxiert)
- Protection class
- IP65
Approvals
- DGRL 2014/68/EU Kat:IV
- Baumustergeprüft gemäß Druckgeräterichtlinie
- DIN EN12263:1998
- Kälteanlagen und Wärmepumpen Sicherheitsschalteinrichtungen zur Druckbegrenzung -Anforderungen und Prüfungen; Kategorie IV
- DIN EN378:2020
- Kälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen
- DIN EN61508:2011
- SIL2
Measuring ranges
- Measuring range relative pressure (nominal pressure)
- -1…500 bar
- Measuring range differential pressure (nominal pressure)
- 0…1 mbar - 0…1.000 mbar
- Setting accuracy (from nominal pressure)
- 0,1 %
Operating conditions
- Pressure type
- Relativdruck, Differenzdruck
- Temperature of the fluid
- -40…+125 °C
- Ambient temperature
- -20…+65 °C
- Parts in contact with media
- Edelstahl
process connection
- Version relative pressure
- G ¼“ Innengewinde
- Version differential pressure
- G ⅛“ Innengewinde
- Adapter for process connection
- 6mm; 8mm oder 10mm
electrical connection
- Analogue current output
- 1x 4…20 mA
- Digital inputs/outputs
- 2x Alarm oder 1x Alarm & 1x Fernentriegelung
Load capacity of the switching contacts DC (24V)
- DC1
- 16 A
- DC13
- 1,5A
Load capacity of the switching contacts AC (230V)
- AC1
- 16 A
- AC3
- 10 A
- AC15
- 7 A
ES-2
- Measurend
- D : Pressure
- DD : Differential pressure
- Safetyfunction
- A : DWK (pressure switch)
- B : DBK (pressure limiter)
- Direction
- (H) : Rising/Maximum
- (L) : Falling/Minimal
- measuring-range
- 10 : bar
- 60 : bar
- 150 : bar
- 0 : Other (please specify)
Data sheet & documents
Allgemeine Daten ES-Serie
Datenblatt ZT-S
Datenblatt ES-20
Datenblatt ES-21
Datenblatt ES-22
Datenblatt ESE
ES-Serie Handbuch
Konformitätserklärung ES-Serie
SIL2 Zertifikat
TÜV Baumusterprüfung (Modul B)
TÜV Baumusterprüfung (Modul D)
Übersicht Druckmesstechnik
Fluid.iO is your optimal partner for process measurement technology
Application consulting
Together with our application engineers, you will find the right device to sustainably increase the safety and efficiency of your processes.
Commissioning support
After consultation and ordering, we will support you until the measuring device is working optimally at its intended location.
German Producer - Global Supplier
"Made in Germany" - We produce in Germany and deliver worldwide
We have distributors in many industrialized nations worldwide
Our know-how in process measurement technology is your competitive advantage
- Standard sensors and devices for process measurement, air conditioning and refrigeration technology
- customization and development
- Application and sensor consulting for all types of fluids
- Problem analysis and development of proposed solutions
Distribution & Sales
We will advise you personally!
international sales
info@fluidio.de +49-6251-8462-0Use the ES-2x series & benefit from these advantages
- excellent safety features: maximum machine and plant safety
- lower maintenance and system testing costs
- Bluetooth Connectivity & Smartphone App: Retrieve settings, test & activity logs from the device
- You monitor the quality parameter viscosity permanently and directly in the process
- You use a modern, maintenance-free measuring system with very high measuring accuracy
Our application engineers advise you personally, comprehensively and professionally!
Simply contact us by phone or e-mail!