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Resistive Level Sensor

Level control for electrically conductive liquid media - including water, wastewater, acids and brine. (All provided with 1m length rods as standard).

Resistive Level Sensor (2 rods)
Product Information:
2 rod level sensor for use in conjuction with the ES 2001 relay. This version is ideal for providing a single high level alarm for bund, tank, overfill prevention etc.
  • Great Value!
  • 121.95+vat
Resistive Level Sensor (3 rods)
Product Information:
The popular 3 rod version allows for 2 levels of detection by a single relay - enabling greater scope for switch based operations. e.g. pump operation - starts on high, stops on low or vice versa for tank filling.
  • Great Value!
  • 169.95+vat
Resistive Level Sensor (4 rods)
Product Information:
The 4 rod version allows for 3 levels of detection using 2 ES 2001 relays. Effectively grouping the 2 and 3 rod versions in application.
  • Great Value!
  • 219.95+vat
Resistive Amplifier Relay
Resistive Amplifier Relay
Product Information:
This relay can control 2 levels (3 rods). It had adjustible sensitivity levels and timer delay in order to counteract false readings due to foam and liquid waves - providing consistent results. Power feed = 240V as standard.
  • Great Value!
  • 81.95+vat
Heat Shrink (by length)
Product Information:
Heat shrink tubing to prevent false readings due to scale or foam build up.
  • Great Value!
  • 3.95+vat p/m

Bamo - Full Product Description


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


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).


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.


Main power supply: 230 V AC - 50/60 Hz (standard) - other on request Consumption: 2 VA Working temperature: Maximal, +45C 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 instructions

For all conductive liquids - From 1 to 5 electrodes - All motionless parts - Adjustable lengths on site - Maximum pressure 15 bar - Maximum temperature 110C - Process connections in PPh or stainless steel 316 - Rods are in stainless steel or titanium


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...


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.


A vertical mounting above the tank is the best; if it is not possible, the limit angle is 45C, 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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