Frequently Asked Questions
How water sensors work?
Water sensors are extension of electronic circuit inside the water level alarm or automation. A small sensing signal (6-8) is sent to one water sensor in water tank though the signal wire conducting water sensors to control device. When other water sensors get dipped in water the signal from is conducted through water to other water sensor, which sends it back to control device to activate the function connected to that sensor. Please click here for a detailed overview with diagrams.
Is there any risk of electric shock?
No, there is no risk of electric shock when using SensaSwitch water level controls and water sensors. SensaSwitch devices are fully safe and have foolproof insulation from high input volts, due to use transformer. Transformer provides low (12-18) volts output which is not materially connected to input mains. As water sensing signal is even less, only 6-8 volts, handling water sensors is fully safe. Further, current limiting components used in circuit make our devices absolutely safe to use.
Which wire to use?
For alarms, any two wires can be used but it will be better to use single pair, telephone signal cable of good make. For auto-stop or fully automatic devices two pair telephone wire should be used for open laid wiring. Telephone cables are easy to handle and best when wire is to be laid open along wall or on roof. For concealed wiring or for high rise buildings, it is better to use standard electric cables (1mm).
Water sensors conduct water sensing signal but what makes their job tough is high heat and humidity found in water tanks. SensaSwitch supplies devices which are especially built to withstand such heat and humidity to ensure reliable working over years. So it is absolutely essential that water sensors supplied with SensaSwitch devices are used. Generally electricians avoid connecting water sensor and say "just naked wires are good enough to conduct signal" but that is not right. Naked wires get affected by heat and humidity inside water tank, whereas SensaSwitch water sensors will remain immune to any such effects and will ensure good working.
Why use water sensors?
Why two sensors for water level alarms?
Two water sensors are sensor signal probes. When both sensor signal probes get dipped in water, sensing signal flows from one probe to second probe through water. This completes sensing circuit to activate alarm at desired level.
Why keep gap between water sensors?
We advise 1-2 inches gap between water sensors so that water sensors do not touch each other. This is to avoid false alarm due to water sensors touching each other during very high heat and humidity in water tank.
Is replacement means "new"?
When a product in warranty becomes defective, sensaswitch offers to repair/ replace it. Repair means product will first come to SensaSwitch and then will be sent back after repairs. Whereas replacement means a similar (repaired tested ok unit of similar condition) device is lying ready with SensaSwitch when warranty claim is made. So instead of waiting for defective product to arrive, SensaSwitch pro-actively send replacement to buyer against the defective product. So replacement reduces warranty service time to half. Buyers appreciate this pro-active service by SensaSwitch.
How to control many tanks?
Having more then one overhead water tank is very common in India. Most of times it is possible that one water level alarm or automation be used to monitor or control water level in all of water tanks. But yes, it requires a little more attention and work at site to get it done. Based on placement of water tanks with respect to each other, site solution differs. In water-works section in our blog we have discussed different water tank scenarios in detail with diagrams to show what need to be done. Please click here to reach water-works section in blog