A robust, smart dew point sensor for permanent monitoring of compressed air and industrial gas dryers. Features built-in autocalibration, programmable alarm LED, and both 4–20mA and RS485 Modbus RTU outputs for direct integration with VPVision or any BMS/SCADA system. Measurement range -70°C to +60°C.
The VP Dew Point Sensor is the complete dew point sensor for all your measurement applications. The sensor is robust and smart with its autocalibration functionality. With both 4..20 mA and RS485 (Modbus RTU) outputs, you can connect the sensor to VPVision or other management systems.
Built-in alarm function
Prevent dryer failure, water carry over or production losses: set an alarm and make it visible in your management system. With the unique, programmable alarm LED on the VP Dew Point Sensor itself, your alarm is visible directly in the work place.
Failure proof
The sensor fully withstands getting wet, so the transmitter performs exceptionally well in applications that occasionally experience process water spikes, such as pipeline condensation during a system failure or start-up. The sensor is also highly resistant to particulate contamination, oil vapor and most chemicals, and is insensitive to the flow rate.
Analog and digital interface
Thanks to the RS485 (Modbus RTU) output multiple parameters can be read out, such as dew point and alarms. The 4..20 mA output can be connected along with the RS485 (Modbus RTU) output.
Thin film polymer technology
The typical recalibration interval is two years. This long-term high performance is achieved with state-of-the-art polymer technology. Thanks to the built-in offset calibration algorithm, performance at low dew points is optimized.
Highlights
- Thin film polymer sensor technology — 2-year recommended calibration interval
- Built-in autocalibration algorithm optimizes performance at low dew points
- Programmable alarm LED — visible directly at the installation point
- Fully withstands getting wet — handles process water spikes, condensation, and system start-up events
- Highly resistant to particulate contamination, oil vapor, and most chemicals
- Insensitive to flow rate
- 4–20mA analog output + RS485 Modbus RTU digital output — simultaneous
- Compatible with VPVision and all standard BMS/SCADA systems
- Optional sampling block for sensor protection and faster response
- Optional external display with alarm relay
- IP66 / NEMA 4, stainless steel housing
- 1 Year Warranty
Technical Specifications
Parameter | Specification |
MEASUREMENT | |
Sensor Technology | Thin film polymer |
Sensor Protection | Stainless steel sintered filter |
Measurement Range | -70 – 60°C / -94 – 140°F |
Accuracy (air or N₂) | ±2°C / ±3.6°F |
Accuracy (>12 bar) | ±4°C / ±7.2°F |
Water Concentration Accuracy | 1 ppm + 20% of reading (at 20°C, 1 bar) |
Recommended Calibration Interval | 2 years |
RESPONSE TIME | |
-60°C → -20°C Td | 5 sec [15 sec to 90%] |
-20°C → -60°C Td | 45 sec [10 min to 90%] |
OUTPUTS | |
Analog | 4–20mA scalable |
Digital | RS485 2-wire, non-isolated, Modbus RTU |
Alarm | Programmable LED |
ELECTRICAL | |
Supply Voltage (4–20mA) | 18–28 VDC |
Supply Voltage (RS485) | 12–28 VDC |
Supply Voltage (>20 bara or <0°C) | 24–28 VDC |
Supply Current (normal) | Max. 10 mA + load current |
Supply Current (self-diagnostics) | Max. 220 mA pulsed |
MECHANICAL | |
Process Connection | ISO G½" |
Housing Material | Stainless steel AISI316L |
Weight | 90g / 3.2 oz |
IP Rating | IP66 / NEMA 4 |
OPERATING CONDITIONS | |
Target Gases | Non-corrosive gases |
Operating Temperature | -40 – 60°C / -40 – 140°F |
Relative Humidity | 0–100% RH |
Operating Pressure | 0–50 bara / 725 psia |
Certifications | CE EN61326-1, EN55022 |
Ordering Information
Order Code | Description |
VPA.8000.1018 | VP Dew Point Sensor BSP (-70 to +60°C / -94 to +140°F) |
VPA.8000.1019 | VP Dew Point Sensor Kit — includes sensor, sampling block, 10m cable, quick connector, ¼" male connector, leak screw with sound muffler, calibration certificate |
Accessories
Order Code | Description |
VPA.8000.1514 | Sampling block with 3/8" BSP female connection |
VPA.8000.1515 | O-ring set (3 pieces) — install without teflon tape, reusable |
VPA.8000.1511 | USB service cable for sensor configuration |
VPA.8000.1510 | 4-pin M8 cable 10m / 32.8ft |
VPA.8000.1516 | Replacement filter |
VPA.8000.1517 | Adapter ½" NPT to 3/8" BSP |
VPA.8000.1512 | External Display 420 |
VPA.8000.1513 | External Display 420 with alarm relay |
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