Dissolved Oxygen Sensor

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.

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Sensor Specifications

Download the Spec Sheet

Sensor

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.

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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

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