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MTE HYDROCAL 1001+ Online Composite Dissolved Gas Analysis & Moisture

The HYDROCAL 1001+ is equipped with 2 Analogue 0/4 … 20 mA outputs for the dissolved composite gas-in-oil and moisture in oil analysis results and 4 digital relay outputs (Hi-alarm, Hi-Hi-alarm, moisture-alarm and system function alarm).

For more information please refer to the HYDROCAL 1001+ data sheet. If you have any further questions or would like a quotation please contact our sales team.


MTE HYDROCAL 1001+ Online Composite Dissolved Gas Analysis & Moisture


The HYDROCAL 1001+ is a permanently installed composite gas-in-oil sensor for the analysis of the following dissolved key fault gases (TDCG = Total Dissolved Combustible Gases):

Fault Gas TDCG Contribution
Hydrogen (H2) approx. 20 %
Carbon Monoxide (CO) approx. 30 %
Methane (CH4) < 5 %
Acetylene (C2H2) 100 %
Ethylene (C2H4) approx. 32 %
Ethane (C2H6) < 5 %

To provide an even more comprehensive transformer monitoring solution, the HYDROCAL 1001+ analyses additionally the content of moisture (H2O) in the transformer oil.

The integration of 6 relevant key gases into a total weighted gas concentration and the measurement of Moisture in oil enables the HYDROCAL 1001+ to react to most transformer faults and makes the device to a compact and cost-effective tool used for early transformer fault detection and preventative maintenance.

Key advantages:

  • Composite measurement of Hydrogen (H2), Carbon Monoxide (CO), Methane (CH4), Acetylene (C2H2), Ethylene (C2H4), Ethane (C2H6) and dissolved Moisture (H2O) in the transformer oil
  • Relay outputs with light indicators showing potential alerts
  • Easy and fast installation without any operational interruption of the transformer
  • Compact and resistant design for long lasting usage
  • Communication interfaces ETHERNET 10/100Mbit/s (copperwired or fibre-optical) and CAN bus to support proprietary communication protocols and to be prepared for sub-station communication protocols MODBUS®TCP and CANopen

HYDROCAL Comparison

HYDROCAL 1011 genX animated
1001+ 1003 1005 1008 1009 1011
Hydrogen (H2)
Moisture in Oil (H2O)
Carbon Monoxide (CO)
Carbon Dioxide (CO2)
Methane (CH4)
Acetylene (C2H2)
Ethylene (C2H4)
Ethane (C2H6)
Oxygen (O2)
Nitrogen (N2)
Propane (C3H8)


Additional information

Weight 4 kg
Dimensions 218 × 224 × 195 mm
Operation temperature (ambient)

-55°C … +55°C

Oil temperature (inside Transformer)

-20°C … +90°C

Storage temperature (ambient)

20°C … +65°C

Oil pressure

Up to 800 kpa (no negative pressure allowed)

Connection to valve

G 1½" DIN ISO 228-1 or 1½” NPT ANSI B 1.20.1

Safety - Isolation protection

IEC 61010-1:2002 CE certified

Safety - Degree of protection

IP-55 CE certified

Product Enquiry

Please contact our sales for the product information. E-mail : [email protected]