Application 

Pump protection for a tailings dam.

Key Requirements

• ‘Dry-run’ monitoring for pump protection
• Suspended solids to not affect the flow sensor’s operation
• Easily adjustable switching point
• Wide voltage range
• Robust housing

Solution

weber 4120.12M flow-captor with the following key features;

• Calorimetric principle flow sensor capable of monitoring flow rates of up to 3m/s and switching loads of up to 400mA
• Stainless steel insertion probe than can withstand pressures of up to 100 bar and is not affected by suspended solids
• Easily accessible range and set point adjustments with a visual analogue display of flow rate
• Wide 10VDC to 36VDC range
• Stainless steel IP67 housing that withstands ambient temperatures of up to 70 deg C

Application 

Monitoring of the water level within an underground coal mine.

Key Requirements

• Certified for use within an underground coal mine (potential for methane gas)
• Analogue output to measure up to 30m of water depth
• Facility for cable and catenary connection to lower the transmitter 300m down a bore
• High accuracy and repeatability
• Sensor referenced to atmosphere

Solution

STS ATM.ECO/N/Ex submersible pressure transmitter with the following key features;

• IECEx certification
• 4-20mA output with 3X overpressure on a 0-30m range transducer
• 330m intrinsically safe ‘blue’ cabling with Viton seals and catenary fittings on the rear of the stainless steel housing
• 0.1% FS accuracy with temperature compensation from -5 to 80 deg C
• Sensor referenced to atmosphere via an integrated ‘breathing’ filter