Precision Liquid Level Controller
HEASTERN Industries has released its new generation of liquid level controllers, the model IQ-112 manufactured by IQ Instruments.
The controller is designed to control the level of (electrically) conductive liquids such as sewage, water, acids, alkalis, beverages, wine, milk, detergents, etc.
It operates using the conducting properties of liquids to complete an electrical circuit between an electrode and metal storage tanks.
For non-metal or coated tanks, the earth path may be positioned through the pump pipework, or an earth electrode may be fitted extending below the lowest active electrode.
These level controllers use a low voltage dc signal on the electrodes, which is reversed at a low frequency to minimise plating of the electrodes. This also allows for longer cable runs before cable capacitance has any effect (up to 500 metres).
The IQ-112 offers precise level detection with no deadband. Programmable to fill or empty tanks, thus protecting against dry running of pumps.
Two sensitivity ranges are provided, to enable the IQ-112 to be optimised for all applications, from effluent to distilled water.
Additionally, the DIN Rail mounting IQ-112 conductivity level controller can be used as a flow switch, detecting the presence of solution in pipelines or as a high/low alarm unit on tanks.
A wide selection of sensing electrodes is available, and the IQ-112 can operate off a power supply from 10V dc to 240V ac, making it suitable for remote site installations (eg: solar powered battery cells) or in a factory application off 240V ac mains power.
The controller is designed to control the level of (electrically) conductive liquids such as sewage, water, acids, alkalis, beverages, wine, milk, detergents, etc.
It operates using the conducting properties of liquids to complete an electrical circuit between an electrode and metal storage tanks.
For non-metal or coated tanks, the earth path may be positioned through the pump pipework, or an earth electrode may be fitted extending below the lowest active electrode.
These level controllers use a low voltage dc signal on the electrodes, which is reversed at a low frequency to minimise plating of the electrodes. This also allows for longer cable runs before cable capacitance has any effect (up to 500 metres).
The IQ-112 offers precise level detection with no deadband. Programmable to fill or empty tanks, thus protecting against dry running of pumps.
Two sensitivity ranges are provided, to enable the IQ-112 to be optimised for all applications, from effluent to distilled water.
Additionally, the DIN Rail mounting IQ-112 conductivity level controller can be used as a flow switch, detecting the presence of solution in pipelines or as a high/low alarm unit on tanks.
A wide selection of sensing electrodes is available, and the IQ-112 can operate off a power supply from 10V dc to 240V ac, making it suitable for remote site installations (eg: solar powered battery cells) or in a factory application off 240V ac mains power.
HEASTERN Industries has announced the new range of 4-digit microprocessor-based digital panel meters by IQ Instrumentation.
These digital panel meters come in the industry standard panel cut-out size of 1/8 DIN (96 X 48mm front facia).
This versatile range of IQ4 digital displays accept a wide range of inputs such as:- ac or dc volts; all common thermocouple types, Pt100, Pt500 or Pt1000 as well as other process signals.
HEASTERN Industries has announced a new unique head-mounting loop-powered (4-20 mA output) transmitter for pH electrodes with precise temperature compensation. The design (hockey puck style) will allow direct mounting into a standard IP65 (thermocouple style) head assembly.
All pH electrodes, being high impedance devices, produce a millivolt (mV) output signal, proportional to the measured pH. This signal (mV) is not ideal for many applications (such as process control on effluent run offmonitoring, etc.), where the pH sensor is mounted quite some distance from the final monitoring/control instruments.