
Dold Level Relay_x000D_
The Dold MK9151 series liquid level relay is a single input and DIN rail mount device. It monitors and controls conductive liquids and powders, example maximum and minimum fill level, protection against overfilling and dry running. The 3-probe connections for 2-point and 1-point level control. It has 220VAC to 240VAC supply voltage. General resistance monitoring, example recording temperature limits with PTC (device to IEG 255, VDE 0435 section 303). This device is straightforward to install and safe to use._x000D_
Features and Benefits_x000D_
High interference resistance of the measuring circuit, which is isolated from the mains_x000D_
Maximum wire length to the probes is 1500m_x000D_
Large setting range between 2kohm and 450kohm which permits differentiation between fluid and foam_x000D_
Adjustable response and release time delay: 0.2seconds to 20seconds_x000D_
Programmable for open circuit operation (without bridge) or closed circuit operation(bridge X1-X2 or X1-COM)_x000D_
Green LED for operation_x000D_
Yellow LED for contact position_x000D_
1 or 2 changeover contacts_x000D_
Also available with a sealable transparent cover_x000D_
Applications_x000D_
Liquid Level Relays (Conductive Level Sensors) are used in a wide variety of applications including waste water management and the monitoring and management of corrosive liquid media and designed specifically to provide for the: Monitoring and control of liquid levels_x000D_
Protection of pumps against dry running_x000D_
Ability to detect liquid leaks in a system_x000D_
Control of media mixing ratios_x000D_
Control of liquid levels_x000D_
General resistance monitoring tasks, e. G. limit temperature detection with PTC_x000D_
Certifications_x000D_
IEC/EN 60 255_x000D_
DIN VDE 0435-303_x000D_
IEC/EN 61 140_x000D_
IEC/EN 60 947-1_x000D_
CSA approval_x000D_
IP40 rated