Rugged Aluminium Enclosure
IP65 / IP67 environmental protection.
Other
Biogas RH Transmitter
Reliable humidity measurement for wet gas and biogas applications.
The FlowDo Biogas RH Transmitter is designed for relative-humidity measurement in demanding biogas, wet-gas and compatible industrial-gas applications. It combines a high-accuracy capacitive HUMICAP® sensing element with an SS316L probe and PTFE sintered filter for stable industrial humidity monitoring.
The transmitter supports standard 4–20 mA and RS485 Modbus outputs for integration with industrial monitoring and control systems.
0–100 %RH
Measuring Range
±1.5 %RH
Accuracy
4–20 mA / RS485
Output
IP65 / IP67
Protection
Product Overview
Built for humidity measurement in demanding gas applications.
The FlowDo Biogas RH Transmitter provides continuous relative-humidity measurement for biogas, wet-gas and compatible industrial-gas applications.
At the heart of the transmitter is a capacitive HUMICAP® sensor element designed to provide accurate and stable humidity measurement. The sensing assembly is protected by a PTFE sintered filter that helps protect the sensor from dust and moisture while allowing humidity measurement.
The SS316L probe provides corrosion-resistant construction for suitable industrial applications, while the rugged aluminium enclosure provides IP65 / IP67 environmental protection.
With 4–20 mA and RS485 Modbus outputs, measurement data can be integrated into compatible industrial monitoring, automation and control systems.
Verified Product Data
Technical Specifications
Measured Parameter
Relative Humidity (%RH)
Sensor Type
Capacitive (HUMICAP®)
Measuring Range
0–100 %RH
Accuracy
±1.5 %RH
Output
4–20 mA / RS485 Modbus
Power Supply
24 VDC
Process Connection
1/2" BSP (M)
Probe Material
SS316L
Filter
PTFE Sintered Filter
Protection
IP65 / IP67
Operating Temperature
-20 to +80 °C
Application
Biogas, Wet Gas, Industrial Gas
Sensor Technology
High-accuracy HUMICAP® sensing element.
The transmitter uses a capacitive HUMICAP® sensing element for relative-humidity measurement. The sensor assembly is designed to provide stable measurement performance for suitable wet-gas and biogas applications.
HUMICAP® Sensor
↓
Humidity Detection
↓
Signal Processing
↓
4–20 mA / RS485 Modbus
Product Construction
Industrial sensing assembly.
Process Connection
1/2" BSP (M)
SS316L Probe
Corrosion-resistant construction for suitable applications.
PTFE Sintered Filter
Protection from dust and moisture while allowing humidity measurement.
HUMICAP® Sensor
Capacitive relative-humidity sensing element.
Key Features
Purpose-built for industrial humidity measurement.
Suitable for Biogas / Wet Gas
Designed for relative-humidity measurement in suitable biogas and wet-gas environments.
High Accuracy & Stability
Provides ±1.5 %RH measurement accuracy using a capacitive HUMICAP® sensor.
SS316L Probe & PTFE Filter
Industrial probe construction with a PTFE sintered sensing-element filter.
Dual Industrial Output
Supports 4–20 mA and RS485 Modbus communication.
IP65 / IP67 Protection
Rugged aluminium enclosure with industrial environmental protection.
Optional Flameproof Housing
Optional: Flameproof (Ex d) housing configuration.
Industrial Integration
Ready for monitoring and control systems.
Standard industrial analog output for integration with compatible controllers, indicators and monitoring equipment.
Digital communication interface for integration with compatible industrial monitoring and automation systems.
Applications
Designed for challenging humidity-monitoring environments.
Biogas
Relative-humidity monitoring for suitable biogas process applications.
Wet Gas
Humidity measurement where gas streams contain significant moisture.
Industrial Gas
Relative-humidity measurement in compatible industrial gas monitoring applications.
Configuration Options
Verified product configuration.
Probe Length
Customizable / Available as per requirement
Standard Output
4–20 mA / RS485 Modbus
Standard Protection
IP65 / IP67
Optional Housing
Flameproof (Ex d)
Process Connection
1/2" BSP (M)
Frequently Asked Questions
Biogas RH Transmitter FAQs
Common technical questions regarding relative humidity measurement in industrial gases.
What is a biogas RH transmitter?
A specialized relative humidity and temperature transmitter designed to operate accurately in wet, corrosive biogas and industrial gas streams.
Does condensation harm the sensing element?
The sensor incorporates specialized polymer HUMICAP technology and heated sensor options to resist condensation and maintain fast recovery in saturated gas.
What communication and analog outputs are available?
4–20 mA analog outputs for RH and temperature, plus RS485 Modbus RTU communication for digital telemetry.
What are the wetted materials?
Stainless steel probe with sintered stainless steel or PTFE filter caps to protect the sensing element from particulates and moisture droplets.
Where is the transmitter typically installed?
In biogas digester lines, landfill gas collection pipes, scrubber outlets, and industrial gas ducts.
Can it connect to IoT telemetry systems?
Yes, it integrates directly with PLCs, SCADA, and FlowDo IoT cloud telemetry gateways via RS485/Modbus.
Technical Selection
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