Bamo - Full Product Description
ES 2001 RESISTIVE AMPLIFIER RELAY FOR LEVEL CONTROL
INSTRUCTIONS NOTE
 Relay Factsheet & instructions
- For all electrical conductive liquids
- Small dimensions 22.5 mm width, rail DIN mounting
- Adjustable sensitivity and timer
- Selection of action mode
- Functions:
On / Off level controller between 2 rods
Level regulation between 3 rods
PRINCIPLE
The resistive amplifier relay for level control ES 2001 works with the electrical conductivity property of the liquid, detecting the opening or closing circuit between two electrodes.
A complete range of probes and rods are specially designed to answer to all type of applications.
The sensibility is adjusted in relation to the liquid conductivity from 1 to 150 kOhm. The hysteresis between on/off relay switching is about 10% of sensibility; This is to avoid false alarms originated by smog, foam or condensation of vapours.
With both timers, it is easy to adjust the level detection or level regulation even if the fluid surface is moving (small wave effect).
APPLICATIONS
Level control for electrically conductive liquid media.
- Minimal or maximal level.
- Dosing, flow detection and alarm, pump control, solenoid valve control, fluid detection in a pipe.
With appropriate electrodes for use as limit transducer in:
- Water, wastewater
- Acids, lye
- Brines, etc.
TECHNICAL FEATURES
Main power supply: 230 V AC - 50/60 Hz (standard) - other on request
Consumption: 2 VA
Working temperature: Maximal, +45°C
Housing: IP40 - cabinet, tropicalized version, on request
Mounting: Rail DIN 46277
Galvanic insulation: Between main line and electrodes circuit
Sensitivity: 2 adjustable ranges, 1...70 kOhm and 5...150 kOhm
Switching power:
500 VA / 250 V AC / 5 A - 1 A / 125 V DC / 40 W
Screw connectors for reverse contact
Timers, adjustable:
t = 0.5 to 5 s for increasing level
0.5 t for decreasing level
Hysteresis: approx. 10% of adjusted sensitivity
Electrodes circuit: 6 V AC, < 1.5 mA
Indicators: 1 operating LED, 1 switching status LED
STE MOUNTING HEAD AND PROBES
INSTRUCTIONS NOTE
STE instructions
For all conductive liquids
- From 1 to 5 electrodes
- All motionless parts
- Adjustable lengths on site
- Maximum pressure 15 bar
- Maximum temperature 110°C
- Process connections in PPh or stainless steel 316
- Rods are in stainless steel or titanium
PRINCIPLE
The difference of electrical resistance when electrodes are immerged in the conductive fluid switches a contact relay ES 2001 (please refer to documentation 530).
APPLICATIONS
Control or regulation of level fluid in open or closed tanks, flumes, etc.
Detection of fluid or lack of fluid in pipes, fluid leakage, pumps protection...
DESCRIPTION
Each probe is made of 3 main parts:
- The housing: in PPh with cable gland 9 mm. Protection IP 65.
- Process connection: assures also electrical insulation between the rods, and with the tank. Material: PPh or stainless steel 316 Ti.
- Rods 4mm diameter: 1 to 5 according to the model. Material: stainless steel 316 L or titanium (on request). Standard lengths are 500 to 2 000 mm and should be adjusted on site.
MOUNTING
A vertical mounting above the tank is the best; if it is not possible, the limit angle is 45°C, downward. Caution: it is necessary to avoid any short circuit due to the liquid standing between two rods.
Verify concordance of pressure, temperature and chemical resistance of the probe with the process conditions. Caution: it is necessary to avoid damages due to vapours and condensation. Our technicians may help you to choose a model.
If possible, do not fit a plastic connection probe on metal: it could destroy the thread probe; blocking nuts are available.
If there are fluid turbulences, take care of accidental rods touching originating false signals; sheathed rods are available, or a tranquilization area could be a solution.
If the fluid creates deposit or if vapours exist: it is necessary to avoid any electrical short circuit between rods with sheathed rods.
To determine number of necessary rods: 1 for each level + 1 reference rod if the tank is not of an electrical conductive material
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