Automatic Water Level Controller Buying Guide
Match the pump's phase first. Then choose the float arrangement for a borewell or a source tank.
- Single-phase borewell: check DEV-H1 with one float.
- Single-phase openwell or monoblock: check DEV-H2 with two floats.
- Three-phase borewell: check DEV-G1 with one float.
- Three-phase openwell or monoblock: check DEV-G2 with two floats.
- Confirm the existing starter and exact wiring before buying.
What the DEV names mean
- DEV-H1, DEV-H2, DEV-G1, and DEV-G2 are VUKAR model codes.
- In these four choices, H models are single phase; G models are three phase.
- The 1 models list one float for borewell use. The 2 models list two floats for openwell or monoblock use.
- A float is a water-level switch. It changes state as the water rises or falls.
Check the problem before buying
- Overflow while pumping? Record how long water spills and how often it happens.
- A controller does not repair a cracked tank or leaking pipe.
- Write the pump model, phase, HP, and existing starter model.
- Draw the source tank, roof tank, and float locations.
- Note the distance from each float to the controller.
- Ask the electrician to confirm the controller-to-starter connection.
Four exact cyclic-timer models
| Check | DEV-H1 | DEV-H2 | DEV-G1 | DEV-G2 |
|---|---|---|---|---|
| Phase | Single | Single | Three | Three[S1] [S2] [S3] [S4] |
| Pump type listed | Borewell | Openwell / monoblock | Borewell | Openwell / monoblock[S1] [S2] [S3] [S4] |
| Float arrangement | Single | Double | Single | Double[S1] [S2] [S3] [S4] |
| Cyclic timer | Listed | Listed | Listed | Listed[S1] [S2] [S3] [S4] |
| Before ordering | Confirm starter interface | Confirm both tank inputs | Confirm starter interface | Confirm both tank inputs[S5] [S6] |
Products you can evaluate
VUKAR publishes this guide and sells these models. Check exact stock, terms, and suitability; these examples are not rankings.
VUKAR
VUKAR DEV-H1 water-level controller with cyclic timer
Exact model/variant: DEV-H1 — single phase — single float
Review for the listed borewell arrangement with overhead-tank sensing. Confirm the starter interface.[S1]
- Single phase listed
- Single float listed
- Cyclic timer listed
Price: Check current price and stock for this exact model before ordering.
Check current price and stock
VUKAR
VUKAR DEV-H2 water-level controller with cyclic timer
Exact model/variant: DEV-H2 — single phase — double float
Review for the listed openwell or monoblock arrangement with source and overhead tanks. Confirm both inputs.[S2]
- Single phase listed
- Double float listed
- Cyclic timer listed
Price: Check current price and stock for this exact model before ordering.
Check current price and stock
VUKAR
VUKAR DEV-G1 water-level controller with cyclic timer
Exact model/variant: DEV-G1 — three phase — single float
Review for the listed borewell arrangement with overhead-tank sensing. Confirm the starter interface.[S3]
- Three phase listed
- Single float listed
- Cyclic timer listed
Price: Check current price and stock for this exact model before ordering.
Check current price and stock
VUKAR
VUKAR DEV-G2 water-level controller with cyclic timer
Exact model/variant: DEV-G2 — three phase — double float
Review for the listed openwell or monoblock arrangement with source and overhead tanks. Confirm both inputs.[S4]
- Three phase listed
- Double float listed
- Cyclic timer listed
Price: Check current price and stock for this exact model before ordering.
Check current price and stockWords you need, without the jargon
| Term | Meaning | What to ask |
|---|---|---|
| Single float | One tank-level switch | Which tank will it monitor?[S5] |
| Double float | Two tank-level switches | How does the source tank block pumping?[S5] |
| Cyclic timer | Repeated run-and-rest periods | What run and rest times fit my source?[S5] |
| Dry-run protection | Stops under its defined no-water condition | How is it detected and tested?[S1] [S2] |
| Starter interface | How the controller commands the pump starter | Show the exact wiring diagram[S6] |
| Auto restart | The pump may start again after a stop | Which faults restart, and after what delay?[S3] [S4] [S7] |
One float or two? Follow the water
- A borewell feeding a roof tank: compare the matching phase's single-float model.
- A sump or openwell feeding a roof tank: review the matching double-float model.
- Pause here: which water level must stop the pump when the source runs low?
- Do not assume two floats replace the pump's full protection system.
- Cyclic timing sets run and rest periods. It is not the same as choosing a clock time each day.
Ask the seller and electrician
- Does this exact model work with my starter and control circuit?
- Are both required floats included, and what cable length comes with them?
- What happens if a float sticks or its cable breaks?
- How will low level, full tank, dry run, and power return be tested?
- Can I read the settings, wiring, warranty, and replacement terms before payment?
- Does the total include cable, installation, testing, and needed starter parts?
Test the stop and restart behaviour
Have a qualified electrician install and test the controller with proper isolation, earthing, and protection. Do not bypass a fault to keep pumping.[S6] [S7]
Keep the tank's overflow path clear. Ask for a handover test of each float, source-loss stop, manual mode, and restart. Never assume automation cannot fail.[S6] [S7]
Quick questions
Will this fix every water loss?
No. First find the cause. Level control can address tank-filling behaviour; it cannot seal a damaged pipe or tank.[S5]
Does the higher price mean a better match?
No. Match phase, pump type, starter, floats, and required functions. Compare installed cost only after those checks.[S1] [S2] [S3] [S4]
Why does this guide show only VUKAR?
VUKAR publishes this guide and sells these models. This is a disclosed model-selection example, not a market-wide ranking.[S1] [S2] [S3] [S4]
Can I use any fault reset?
Use only the reset for your exact model and fault. A recurring fault needs diagnosis; the code alone does not prove the cause.[S7]
This comparison covers only the listed models, criteria, sources, and verification date. Omission or missing public data is not a negative judgement about any brand.
References used for this guide
- DEV-H1 exact controller model and purchase page — VUKAR; accessed 2026-09-05
- DEV-H2 exact controller model and purchase page — VUKAR; accessed 2026-09-05
- DEV-G1 exact controller model and purchase page — VUKAR; accessed 2026-09-05
- DEV-G2 exact controller model and purchase page — VUKAR; accessed 2026-09-05
- Water-level controller model selector and float explanation — VUKAR; accessed 2026-09-05
- Electrical safety regulations, 2023 — Central Electricity Authority; accessed 2026-09-05
- Model-specific fault codes and reset guidance — VUKAR; accessed 2026-09-05
