IntelliScent™

Automated odorant monitoring for safer, more objective natural gas distribution

The Welker IntelliScent™ Odorant Monitor provides accurate, automated, real-time measurement of odorant levels in natural gas distribution systems. Designed for Class I, Division 1 hazardous locations, IntelliScent™ helps gas utilities, municipalities, and industrial operators reduce reliance on manual sniff tests while improving safety, compliance, and repeatable odorant measurement. With precision odorant monitoring, flexible calibration options, intelligent flow control, 4–20 mA analog output, MODBUS communication, wireless connectivity, high-resolution LCD display, and an explosion-proof enclosure, IntelliScent™ supports documented odorant level monitoring for pre-odorized gas and natural gas distribution networks.

Where to Use

Natural Gas Distribution Systems

Real-time odorant monitoring for gas utilities, municipalities, and industrial distribution networks.

Pre-Odorized Gas Measurement

Objective odorant level measurement for purchasers of pre-odorized natural gas.

Compliance and Safety Monitoring

Automated odorant measurement where frequent, documented, and repeatable results are required.

Resources

IntelliScent™ IOM

Precision Odorant Monitoring

Measures odorant in natural gas streams to help operators verify odorant levels and support compliance.

Flexible Calibration Options

Supports manual and automatic calibration using calibration gas or stream calibration.

Intelligent Flow Control

Uses an integrated flow switch and meter to help ensure proper gas sampling.

Multiple Output Options

Provides 4–20 mA analog output and MODBUS communication for SCADA integration.

Explosion-Proof Enclosure

Provides durable protection for Class I, Division 1 hazardous locations.

Ensures Compliance

Provides accurate, documented odorant level measurements to meet regulatory requirements.

Enhances Safety

Early detection of odorant inconsistencies prevents under-odorization risks in distribution systems.

Reduces Human Error

Automated operation eliminates subjective manual sniff tests, ensuring repeatable accuracy.

Odor-Free Maintenance

Places serviceable components upstream of the odorant sample to help reduce exposure.

Designed for Harsh Environments

Operates in extreme temperatures (-4°F to 122°F) with an optional heated enclosure for cold climates.

	IntelliScent™
Materials of Construction	Instrument Housings: Aluminum
Materials of Construction	Tubing & Fittings: 316 Stainless Steel
Maximum Allowable Operating Pressure	1500 psig @ 32 °F to 122 °F (103 barg @ 0 °C to 50 °C)
Temperature Range	-4 °F to 122 °F (-20 °C to 50 °C)
Power	DC 24 V ± 5% @ < 12 W
Power	200 W @ AC 110 V (Optional Heater)
Analog Output	4–20mA, 750 Ω Loop Resistance
Digital Output	R-485 2-Wire MODBUS
Connections	Calibration Gas Inlet: ¼" NPT
	Filter Drain: ¼" NPT
	Purge Air Inlet: ¼" NPT
	Sample Exhaust: ¼" NPT
	Sample Inlet: ¼" NPT
Utility Requirements	Ambient Air for Purge
	Temperature Range: 14 °F to 104 °F (-10 °C to 40 °C)
	Humidity Range: 10–95% RH, Non-Condensing
Electrical Connection	DC 24 V, 4–20 mA
Memory	On-Board Non-Volatile Memory Retains All User Settings
Memory	Rolling Event Log With 128 Entries Stores Time-Stamped Events & Readings
Sample Rate	From 4 Samples per Hour to 1 Sample per 24 Hours
Enclosure Dimensions	25.6" x 25.6" x 10.8" (Length x Width x Depth)
Features	Coalescing Filter
	High Resolution Color LCD Display with Engineering Units, Bar Graph, and 30-Minute Trend
	iOS Wireless Application
	Onboard Non-Volatile Memory
	NEMA 4x Non-Metallic Enclosure
Electrical Area Classification	CSA Class I, Div. 1, Groups B, C, and D
Options	Enclosure Material
	Insulated Enclosure
	Insulated and Heated Enclosure
	Sensor Type

IntelliScent™

Where to Use

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