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SPOTTER PLATFORM

### Dissolved Oxygen Sensor

Add a compact, long-dwell dissolved oxygen sensor to your Spotter Platform to monitor dissolved oxygen concentration and saturation in real time.

An integrated anti-fouling wiper and ultra-low power solar-rechargeable battery enables extended deployments and continuous access to water quality insights.

[**Explore Configuration**](https://spotter-configurator.sofarocean.com/?preset-sensor=dissolved-oxygen&step=3&source_page=dissolved-oxygen-sensor)

### Sensor Specifications

[**Download the Spec Sheet**](https://5311899.fs1.hubspotusercontent-na1.net/hubfs/5311899/Spec%20Sheets/Dissolved%20Oxygen%20Sensor_Spec%20Sheet.pdf)

| Sensor Specification | Value |
|-----------------------|-------|
| PME MicroDot Plus (DO + Temperature) |   |
| **Sensor Type** | Optical |
| **Dissolved Oxygen** |   |
| Accuracy | ±5% or ±0.3 mg/L |
| Resolution | 0.001 mg/L (1 µg/L) |
| Range | 0 – 150% saturation |
| **Temperature** |   |
| Accuracy | ±0.1°C |
| Resolution | 0.001°C |
| Range | 0°C – 35°C |
| **Oxygen Response Time** | ~30s to 90% step change |
| **Sampling Rates** | 5 s to 24 hr interval, user-set |
| **Calibration Method** | 96-point factory calibration |
| **Maximum Depth** | 50 m |
| **Power Supply** | Spotter’s Li-ion battery (solar-rechargeable) |
| **Size (Dia. x Len.)** | ~76 mm × 203 mm |
| **Weight** | 0.34 kg (< 0.75 lb) |
| **Interface Standard** | Bristlemouth-native (plug-and-play) |

## Anti-Fouling Wiper

This submersible, self-contained device uses a rotating brush to sweep the sensor surface, reducing organism growth and preventing biofouling. After each pass, the brush retracts to avoid interference, ensuring accurate, continuous monitoring.

## Deployment & Best Practices

**Configuration Options**

Ideal for moored coastal deployments with one Spotter or a network. Integrate up to two more devices (e.g. pressure/current) per Smart Mooring (max 3 total).

**Mounting and Maintenance**

Mount sensor horizontally; avoid sediment or bubble interference. Rinse sensor with fresh water after retrieval. Clean sensing foil periodically; verify calibration annually.

**Remote Configuration & Controls**

Direct control via Spotter Dashboard, binary/ASCII commands, and Sofar remote support.

[Explore Configuration](https://spotter-configurator.sofarocean.com/?preset-sensor=dissolved-oxygen&step=3&source_page=dissolved-oxygen-sensor)

## Data Access & Analysis

**Spotter Dashboard** View real-time data and insights

**API Access** Retrieve data programmatically with our secure API

**Onboard Storage** Download data via SD card for offline analysis

**Transmission** Satellite and cellular options