Fully self-contained autonomous altimeter with a data logger integrated
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Echologger APIs
Echologger AA400 stands out as an innovative and cost-effective solution in underwater monitoring technology. As a low-cost, lightweight, connector-free sonar altimeter, the AA400 is equipped with a data logging facility, making it an ideal choice for long-term monitoring in remote underwater environments where traditional cabling is not feasible.
One of the key features of the AA400 is its high-speed wireless Bluetooth communication capability, allowing for seamless measurement parameter adjustments and data retrieval within minutes. This wireless functionality significantly enhances the device's flexibility and ease of use, particularly in situations where quick and efficient data access is crucial.
The AA400 excels in low power consumption, operating efficiently for extended periods using just three alkaline AA batteries. This exceptional power efficiency enables the device to be deployed for months autonomously, making it a reliable choice for continuous underwater monitoring. Whether measuring accurate water depths or monitoring sediment movements over an extended timeframe, the AA400 proves to be a fully self-contained and autonomous altimeter.
Features
- Fully self-contained device
- No cables needed
- Long life with 3 AA alkaline batteries
- Ideal for long-term monitoring
- High speed Bluetooth Communication
- User friendly GUI software provided
- Also controlled via a terminal program like Hyper Terminal
- Ultracompact and light (H150mm, 450g)
- Depth rates from 100 up to 6,000m
- Unique in the market
AA400
| Acoustic Frequency | 450 KHz |
| Beam width | 5° (-3dB) Conical Beam |
| Transmit Pulse Width | 10 μsec to 100 μsec in 10 μsec steps |
| Ranges | 0.15 m to 50 m |
| Temperature Resolution | 0.1°C |
| Sample Rate | 100 kHz |
| Repetition (Ping) Rate | Up to 10 Hz |
| Range Resolution | Up to 1 mm |
| Interface | Bluetooth v2.1 |
| Digital Output Speed | 115,200 baud (Virtual Wireless Serial Port) |
| Data Output Format | ASCII TXT, CVS |
| Data Storage Mdeia | Non-volatile Flash(2MB) |
| Activation | Magnet switch |
| Operation Mode Indication | Single LED |
| Power Supply | 3 AA-type Alkaline Batteries |
| Operation Lifetime | More than 2 Mpings (30 days@1pps, 3m range) |
| Operation Temperature | -10°C to +50°C |
| Maximum Operating Depth | 100 m (1,000m 3,000m, 6,000m optional) |
| Housing Material | Acetal, Poly Carbonate, SUS |
| Dimensions | D64mm x L140mm (100m version), D90mm x L200mm (6000m version) |
| Weight | 480g in air with batteries (30g in water) (100m version), 2.4kg/1.1kg (6,000m version) |
AA400
What is the AA400 designed for?
The AA400 is a fully self-contained autonomous sonar altimeter designed for long-term underwater monitoring where external power or data cabling is impractical.
Typical applications include:
- sediment movement monitoring
- scour monitoring
- wave / tide measurement
- structure clearance / altitude monitoring
How does the AA400 differ from a standard echosounder?
Unlike conventional echosounders, the AA400:
- operates fully autonomously
- contains integrated battery power and data logger
- requires no power or data cables during deployment
- is optimised for fixed-point long-term monitoring rather than live survey operation
How long can it operate autonomously?
The AA400 is designed for months of autonomous deployment, depending on ping rate and logging settings.
Its ultra-low power design operates using:
- 3 AA alkaline batteries
Battery life varies with measurement interval and operating mode.
How is data retrieved and configured?
The AA400 supports high-speed Bluetooth communication for:
- wireless parameter adjustment
- wireless data download
- rapid field retrieval without opening the housing
It can also be controlled using:
- Echologger GUI software
- Terminal software via virtual wireless serial port
What measurement performance does the AA400 provide?
Typical specifications include:
- Frequency: 450 kHz
- Beam Width: 5° conical
- Range: 0.15 m to 50 m
- Resolution: Up to 1 mm
- Ping Rate: Up to 10 Hz
What depth-rated versions are available?
The AA400 is supplied as standard in a 100 m depth-rated housing.
Optional deeper-rated versions are available up to 6000 m for deep-water deployment.
A right-angled version ("R") is also available for applications requiring side-facing or specialised mounting geometry.
What data format does the AA400 output?
Logged data is stored internally and can be exported in:
- ASCII TXT
- CSV
This allows straightforward post-processing in spreadsheet or analysis software.
Why choose AA400 over cabled monitoring systems?
The AA400 is ideal when:
- cabling is impractical or costly
- deployment location is remote
- long-term unattended monitoring is required
- rapid installation/retrieval is preferred
Its fully self-contained design significantly reduces deployment complexity.
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