DR3601A Outdoor Digital Pressure Switch
DR3601A Outdoor Digital Pressure Switch
The DR3601A is an outdoor version of the DR3601 intelligent digital pressure switch, designed for pressure measurement, display and automatic switching in exposed industrial environments. With an IP66-rated enclosure, 2 or 5 programmable relay outputs, optional 4-20mA or RS485 output, and 24VDC or 220VAC power supply, it provides a flexible solution for outdoor pressure monitoring and control.
Applications
- Outdoor hydraulic equipment
- Water pumping and irrigation systems
- Outdoor industrial machinery
- Compressor and utility systems
- Water treatment and remote monitoring
DR3601A: Digital Pressure Switching for Outdoor Installations
Outdoor pressure control systems often face conditions that are difficult for standard panel-mounted instruments. Dust, rain, moisture and changing ambient conditions can affect equipment installed directly in the field.
The DR3601A Outdoor Digital Pressure Switch extends the DR3601 platform with an outdoor-oriented enclosure while retaining the core pressure measurement and switching functions of the series.
The instrument combines a pressure sensor, digital display, relay control and optional signal transmission in one compact unit. The pressure signal is processed electronically and displayed locally, while programmable switching points allow the instrument to automatically respond when the measured pressure reaches the configured values.
The DR3601 series is designed for applications including hydraulic systems, water supply, petroleum, chemical processing, machinery and other fluid pressure control systems.
Why Choose DR3601A?
One Instrument for Pressure Measurement and Control
Instead of installing a pressure sensor, display instrument and separate relay module, DR3601A integrates these functions into a single device.
Digital Pressure Display
The 4-digit LED display provides a direct local indication of the measured pressure. The DR3601 documentation specifies a display range of -1999 to 9999.
Programmable Switching Points
Each relay can be configured with separate connection and disconnection values. This allows the instrument to perform upper-limit alarm/control, lower-limit alarm/control, or hysteresis switching.
Fast Response
For the 2-relay version, the documented response time is less than 30 ms.
Multiple Relay Configurations
Choose according to the control requirements:
- DR3601A-R1: 2 Relays
- DR3601A-R2: 5 Relays
The 5-relay manual provides separate settings from AL1 through AL5, allowing multiple pressure control points to be configured in one instrument.
2 Relay vs 5 Relay: Choose for Your Control Requirements
2-Relay Version
Suitable when the system requires two independent pressure switching points.
Typical applications:
- Pump start/stop control
- High-pressure alarm
- Low-pressure alarm
- Compressor protection
- Hydraulic system control
Supports 4-20mA + 2 relay outputs.
5-Relay Version
Designed for systems requiring multiple pressure thresholds. Up to five switching points can be configured, each with its own pull-in and release values.
Typical applications:
- Multi-stage pump control
- Multiple pressure alarms
- Hydraulic equipment protection
- Process pressure control
- Multi-level pressure sequencing
IP66 Enclosure for Outdoor Pressure Monitoring
Built for Exposed Installation
DR3601A uses an outdoor-oriented enclosure designed to provide IP66 protection, making it suitable for installations where the instrument may be exposed to dust, rain and water spray.
This makes DR3601A particularly suitable for:
- Outdoor hydraulic equipment
- Water pumping systems
- Irrigation systems
- Outdoor machinery
- Industrial utility systems
- Compressor systems
- Water treatment equipment
- Remote pressure monitoring points
Note: IP66 indicates dust-tight and protection against powerful water jets, but not submersible use.
Flexible Signal and Relay Outputs
DR3601A can be configured for different control and communication requirements.
- Relay Output: 2 or 5 relay options. The relay switching points can be configured according to the required pressure thresholds.
- 4-20mA Output: Analog pressure signal suitable for connection to PLCs, data acquisition systems, industrial controllers, and monitoring systems.
- RS485 Output: Digital communication for applications requiring integration with industrial control or monitoring systems.
24VDC or 220VAC Power Options
DR3601A supports:
- 24VDC: Suitable for PLC-based systems, industrial control cabinets, battery-backed systems, and DC-powered machinery.
- 220VAC: Suitable for installations using standard AC mains power.
Flexible High and Low Pressure Switching
DR3601A does not simply provide a fixed ON/OFF pressure point. Each switching channel can be configured using separate connection and disconnection values.
High-Pressure Switching
Pressure ≥ 4.00 MPa → Relay ON
Pressure < 3.95 MPa → Relay OFF
The difference creates the switching hysteresis.
Low-Pressure Switching
Pressure ≤ 10.00 MPa → Relay ON
Pressure > 9.95 MPa → Relay OFF
Both upper-limit and lower-limit alarm functions are supported.
Technical Specifications
* Please refer to the official DR3601A datasheet for final values. The following are representative.
| Product Type | Outdoor Digital Pressure Switch |
| Pressure Range | -1 bar … 0 … 1000 bar* |
| Accuracy | ±0.25% FS / ±0.5% FS |
| Pressure Type | Gauge / Absolute / Sealed Gauge* |
| Overpressure | 200% FS |
| Display | 4-Digit LED |
| Display Range | -1999 to 9999 |
| Relay Options | 2 Relays / 5 Relays |
| Analog Output | 4-20mA |
| Digital Output | RS485 |
| Power Supply | 24VDC / 220VAC |
| Relay Load | 24VDC 3A / 220VAC 3A* |
| Ambient Temperature | -20°C to +70°C |
| Relative Humidity | ≤80% |
| Housing | Outdoor Enclosure |
| Protection Rating | IP66 |
| Wetted Material | Stainless Steel 304* |
| Pressure Connection | M20×1.5 / G1/4 / G1/2 / NPT1/4 / NPT1/2* |
Applications of DR3601A
- Outdoor Hydraulic Systems: Monitor and control hydraulic pressure while providing local digital indication.
- Water Supply & Pump Systems: Use configurable relay points for pump control, high-pressure protection and low-pressure alarms.
- Industrial Machinery: Integrate pressure switching with machinery control systems using relay, 4-20mA or RS485 signals.
- Outdoor Process Equipment: The IP66 enclosure makes the instrument suitable for pressure control points installed outside electrical cabinets.
- Petroleum & Chemical Equipment: Suitable for pressure measurement and control of compatible fluid media.
Ordering Guide
DR3601A – [Range] – [Installation] – [Relay] – [Output] – [Power] – [Connection] – [Pressure Type]
Example: DR3601A – [0~10]bar – Z1 – R2 – O1 – U1 – C4 – G
| Relay | |
| R1 | 2 Relay |
| R2 | 5 Relay |
| Output | |
| O1 | 4-20mA |
| O2 | RS485 |
| Power | |
| U1 | 24VDC |
| U2 | 220VAC |
| Pressure Type | |
| G | Gauge |
| A | Absolute |
| S | Sealed Gauge |
Installation codes (Z1, Z2) and connection codes (C1–C7) follow the DR3601 series standard.
Installation on Pressure Pipelines
DR3601A can be directly installed on hydraulic pipelines through its pressure connection. For applications involving severe vibration or mechanical shock, the manual recommends using a flexible hose to mechanically decouple the pressure connection. For electrical installation, shielded wiring and short cable runs are recommended to reduce electromagnetic interference.
Frequently Asked Questions
DR3601A is an outdoor version of the DR3601 intelligent digital pressure switch, designed for pressure measurement, digital display and automatic pressure switching in outdoor and industrial environments.
DR3601A is available with either 2 or 5 relay outputs, allowing the instrument to be configured for different pressure control requirements.
Yes. The product can be configured with a 4-20mA analog output for connection to PLCs, monitoring systems and industrial controllers.
Yes. An RS485 output option is available for digital communication with compatible control and monitoring systems.
Yes. DR3601A is designed as the outdoor version of the DR3601 series and uses an IP66-rated enclosure for outdoor installation.
Yes. Two power supply options are available: 24VDC and 220VAC.
Yes. The switching points can be configured on site. Each switching channel uses separate connection and release values, allowing high-limit or low-limit switching with adjustable hysteresis.
Need an Outdoor Pressure Switch for Your Application?
DR3601A combines pressure measurement, digital display, programmable relay control and signal transmission in one IP66 outdoor instrument.
Whether you need 2 relays or 5 relays, 4-20mA or RS485, 24VDC or 220VAC, we can configure the DR3601A according to your pressure range, connection and control requirements.
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