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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

Additional information

Weight 4 kg
Dimensions 218 × 224 × 195 mm
Optional nominal voltages of auxiliary supply

120 V -20% +15% AC 50/60 Hz or, 120 V -20% +15% DC or, 230 V -20% +15% AC 50/60 Hz or, 230 V -20% +15% DC, Other nominal voltages on request!

Power consumption

max. 250 VA



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]