Pro-Oceanus Mini Dissolved CH4 Probe

The Pro-Oceanus Mini CH4 probe is a rugged dissolved methane sensor designed for ocean pipeline leak detection, groundwater, and industrial use.

Features

  • Compact size with low power consumption
  • Large selection of concentration ranges
  • Internal data logger with 2GB flash memory
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Overview
The Pro-Oceanus Mini CH4 instrument uses infrared detection to measure the partial pressure of CH4 gas dissolved in liquids. Conversion to dissolved methane concentration is simple with known temperature and salinity values.

Mechanics
Mini CH4 submersible instruments are compact, lightweight, plug-and-play sensors designed to measure pCH4 for a range of applications. The instrument also measures total dissolved gas pressure (TDGP), a useful parameter for many applications and data correction.

Applications
With resistance to most corrosive liquids, the Mini CH4 can provide reliable dissolved methane data for many applications. Flow-through and inline adapters are also available for simple industrial solutions.

Sensor Performance
pCH4 Measurement Ranges 0-1% CH4 ; by volume (~0-300 μg/L; by mass)
0-10%v/v (~0-3 mg/L)
0-100%v/v (~0-30 mg/L)
Total Dissolved Gas Pressure 0-2 bar
Accuracy: pCH4 ± 3% of max range
TDGP ± 1%
Equilibration rate (t63) ~8 minutes (with water-pumped head)
Resolution 0.1% of max range
Physical
Length 28 cm (11 in)
Diameter 5.3 cm (2.1 in)
Weight Air 0.53 kg (1.2 lbs)
Water: -0.06 kg (-0.1 lbs)
Housing Material Acetal Plastic
Depth Rating 0 - 600 m
Water Temperature 0º to 40º C
Electrical
Input voltage 7-24 VDC
Power consumption 85 mW (7 mA @ 12 V)
Data output Digital: RS-232, ASCII format
Sample rate 2 seconds (variable rate with logger/controller)

All models include:

  • Mini CO2 Instrument
  • USB memory stick with Oceanus Software and User’s Manual
  • QuickStart Guide

Power and communications deck box includes:

  • Water-Resistant deck box with Underwater Cable and Connector Sleeve
  • 2-meter RS-232 cable
  • RS-232-to-USB Converter
  • AC to DC 12 V Power Supply

Internal rechargeable battery models include the items above as well as a battery pack and charger.

Questions & Answers
What is the difference between the digital option and the analog option for the Pro-Oceanus Mini Dissolved CH4 Probe?
The Digital Pro-Oceanus Mini Dissolved CH4 Probe features an internal data logger and controller with 2GB flash memory. Additionally, the digital option uses RS-232, ASCII CSV data output, while analog can utilize either 0-5 V or 4-20mA.
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Pro-Oceanus Mini Dissolved CH4 Probe
M320
Mini dissolved methane (CH4) probe with RS-232 output, includes power/communications box
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Pro-Oceanus Mini Dissolved CH4 Probe
M330
Mini dissolved methane (CH4) probe with RS-232 output & internal 5 A-Hr 6 VDC rechargeable battery pack, includes power/communications box
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Pro-Oceanus Mini Dissolved CH4 Probe
M335
Mini dissolved methane (CH4) probe with RS-232 output & internal 5 A-Hr 12 VDC rechargeable battery pack, includes power/communications box
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Pro-Oceanus Mini Dissolved CH4 Probe
M340
Mini dissolved methane (CH4) probe with RS-232 output & internal 19 A-Hr 6 VDC alkaline battery pack, includes power/communications box
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