Energy Monitor Comparison Chart
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As more wireless energy monitors appear on the market, deciding which model to buy might seem a bit confusing.
As a guide, we've put together this easy to understand features comparison chart so you can compare the specifications and features of each monitor side-by-side.
Because we keep every make and model of wireless energy monitor in stock, we offer impartial advice on all the brands, and whichever one you decide to buy, we can send it out straight away.
Please note that our monitor comparison chart now lists features of the New Owl CM119 monitor which replaces the orginal Owl CM113 from 1st November 2008. The original CM113 is still available to purchase at £29.95 while stocks last.
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| Wattson 01 | NEW Owl CM119 | Efergy | Eco-eye / Mini-eye | |
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| Price | £99.95 | £32.45 | £34.95 | £49.99/£39.99 |
| Portable display |  |
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| Wireless transmitter | |
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| Up to 30m indoor range | |
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| Easy to connect | |
With 3 channels | |
Automatic |
| Easy to read display | |
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| Three phase compatible | (with extra sensors) | (with extra sensors) | (with extra sensors) | (separate model) |
| Economy 7 compatible | |
YES | no | Coming Soon |
| Transmitter battery life | Up to 6 months | Up to 4 years | Up to 6 months | Up to 12 months |
| Transmitter sample rate(s) | 3, 10, 20 sec | 6 sec | 6 sec | 4, 30 sec |
| Manufacturer stated accuracy | +/- 2% | +/- 4% | ||
| Batteries included | 4 x AA | 6 x AA | 4 x AAA | 4 x AA |
| Low battery warning indicator | |
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| High use warning alarm | Via ambient lighting | |
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| Display currencies | £, $, Euro, Yen | £, $, Euro | £, $, Euro | £, $, Euro |
| Voltage settings | 240/415v | 110-250v | 100-400v | 100/115/230/240v |
| Max Amps input rating (per phase) | 52 | 70 | 70 | 80 |
| Country of manufacture | Ireland | China | China | UK |
| Rechargeable battery | |
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| DC adapter input | |
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Sender & receiver | |
| DC adapter included | |
Optional extra | Optional extra | |
| LCD panel | |
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| LED panel | |
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| Instant kWh view | |
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| Instant pence per hour view | |
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| kg CO2 per hour view | |
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| Tonnes CO2 per year view | |
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(Kg per month) | |
| Projected cost per year view | |
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| Memory function | |
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| Micro-generation compatible | |
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| On-board usage history view | |
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| Day/week/month usage view | |
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| 'Trip meter' style accumulated cost counter | |
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| Show total kW usage for current hour | |
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| Sequential display of all modes | |
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| Data storage capacity | 4 weeks | up to 1 year | 2 years | 32 months |
| Date / time display | |
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12/24 hr clock | |
| Temperature / humidity display | Temperature | |||
| Backlit display | |
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| Ambient mood lighting | |
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| USB PC/Mac data link | |
Coming Soon | ||
| PC/Mac data analysis software | |
Coming Soon | ||
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