Moisture in Oil, Fuel Transmitter
The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.
Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.
The Vaisala MMP8 provides continuous online measurement of dissolved moisture and temperature in transformer oil, lubrication oil, hydraulic fluid and other liquid hydrocarbons.
- Measures water activity from 0 to 1 aw, relative saturation, temperature and ppmw
- Dry-end accuracy up to ±0.01 aw or ±1%RS
- Temperature measurement from −40 to +180 °C
- Available in standard 262 mm and long 448 mm probe versions
- Adjustable insertion depth with ISO 1/2 or NPT 1/2 process fittings
- Standalone Modbus RTU or connection to Vaisala Indigo transmitters
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
- Indigo201 with three analog outputs and two relays
- Indigo202 with Modbus RTU and two relays
- Colour display with numerical and graphical views
- IP65 enclosure for industrial measurement applications
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
- Indigo510: one probe and two isolated analog outputs
- Indigo520: two probes, four isolated outputs and two relays
- Ethernet web interface and Modbus TCP communication
- Rugged IP66 and NEMA 4 metal enclosure
Vaisala HUMICAP® MMT310 Series provides continuous online measurement of moisture and temperature in transformer, lubrication and hydraulic oils.
The compact transmitter measures water activity (aw) or relative saturation (%RS), showing how close the oil is to forming free water. Optional ppm calculation is available for mineral transformer oil and configured oil types.
- Models MMT317 and MMT318
- Water activity range: 0 to 1 aw
- Temperature range: -40 to +180°C
- Two configurable analogue outputs and RS-232C
- Up to 40 bar with MMT318 and ball-valve installation
- IP66 compact transmitter enclosure
- Traceable calibration certificates included
The Vaisala MMT330 Series provided continuous measurement of moisture and temperature in transformer oil, lubrication oil, hydraulic fluid and other liquid hydrocarbons.
- Discontinued series; not recommended for new installations
- Legacy MMT332, MMT337 and MMT338 probe configurations
- Measures water activity, relative saturation, temperature and calculated ppm
- Graphical display, data logging and versatile analogue or digital outputs
- Used for oil-condition monitoring, dryer control and free-water risk detection
- Use Vaisala MMP8 with an Indigo transmitter for new installations
The Vaisala MM70 was a portable meter for spot-checking water activity and temperature in transformer, lubrication and hydraulic oils.
- Discontinued product; not recommended for new purchases
- Legacy MI70 handheld indicator with MMP78 moisture-in-oil probe
- Water-activity measurement from 0 to 1 aw
- Temperature measurement from −40 to +100 °C
- Direct insertion through a ball valve without draining the process
- Numerical display, trend graph and portable data logging
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