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Megger
OTS100AF 100kV Auto Oil Test Set Basic Build c/w 400ml Vessel


Megger OTS100AF 100kV Auto Portable Oil Test Set built for reliability designed to measure insulating oil breakdown voltage.

Part Number:
1014-542

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£14700.00
17640.00 incl. VAT)
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Megger OTS100AF 100kV Auto Portable Oil Test Set Overview

The Megger OTS100AF 100kV Auto Portable Oil Test Set is a high-performance laboratory instrument engineered to provide accurate dielectric breakdown and withstand voltage testing of insulating liquids such as mineral, ester, and silicone oils. With its rugged build and advanced electronics, the OTS100AF ensures repeatable, reliable test results, making it a trusted choice for power utilities, industrial service providers, and research laboratories. The unit combines precision electrode alignment, intuitive operation, and compliance with the latest international standards to deliver confidence in every test.

 

Why Choose the Megger OTS100AF?

Monitoring and maintaining the quality of insulating oils is critical to the safe and reliable operation of transformers and other oil-filled electrical equipment. The OTS100AF is designed to meet these needs with exceptional accuracy and durability. Its moulded 400 ml test vessel is resistant to damage and contamination, while lock-in precision electrode adjustment wheels eliminate user error. The automatic test sequences and built-in memory allow seamless operation, making the OTS100AF both a robust laboratory tool and a future-proof investment.

 

What Sets the OTS AF Models Apart?

The OTS AF range (60 kV, 80 kV, and 100 kV) is designed with laboratories in mind. These models feature a larger test chamber for improved accessibility and ease of cleaning. The OTS100AF includes a 12-key alpha-numeric keypad for entering IDs, file names, and notes, simplifying asset management and reporting. For enhanced traceability, AF models also integrate with barcode scanners, allowing oil sample IDs to be logged directly into the system. This ensures smooth integration with LIMS workflows and reduces the risk of data entry errors.

 

▶ Video: Megger OTS Oil Testers Overview

Thumbnail for Megger OTS Oil Tester video

 

 

Megger OTS100AF Key Features:

  • Accurate dielectric breakdown and withstand voltage testing
  • Full range of international test standards preloaded (IEC, ASTM, BS, etc.)
  • Easy adjust – locking electrode gap wheels
  • Fast, precise breakdown detection
  • Ultra-fast (<10 µs) HV switch-off time for safety
  • Laboratory-grade instrument with large chamber for easy access
  • Bright 3.5” QVGA colour display
  • Direct measurement of voltage and current via trip detection circuit
  • USB connectivity for firmware updates and results transfer
  • NEW – IEC60156-2018 compliance
  • NEW – Viscous oil options (IEC60156-2018 V, Annex A, Annex A (V))
  • NEW – Withstand test capability

 

Optimised Test Vessel and Preparation

The OTS100AF ships with a robust 400 ml vessel that complies with IEC and ASTM standards. Proper preparation of the vessel is essential for accurate results: rinse with the oil sample to avoid contamination, set the electrode gap precisely with the supplied gauges, and exclude moisture and air contact during testing. Optional 150 ml vessels are also available for low-volume applications, such as testing small transformers or CTs. Megger’s design ensures repeatable results even in demanding laboratory environments.

 

What Comes with the Megger OTS100AF?

  • OTS100AF 100kV Auto laboratory oil test set
  • 400 ml vessel assembly with stirrer lid fitted
  • Internal impact printer
  • Full IEC and ASTM electrode set
  • IEC and ASTM impellers
  • Electrode gauge set
  • Calibration certificate
  • PowerDB Lite software guide
  • Quick Start Guide
  • OTS Vessel Preparation Guide

 

Other Megger Oil Testers in the Range

Explore additional models in the Megger OTS range. Detailed specifications and data sheets are available in the technical resources section below:

 

❓ Frequently Asked Questions (FAQ)

Q1: What oils can the Megger OTS100AF test?

A. The OTS100AF is suitable for mineral, ester, silicone, and other insulating liquids. It is compliant with multiple international standards, ensuring accurate breakdown voltage testing across oil types.

Q2: How is the OTS100AF different from PB models?

A. PB models (60 kV and 80 kV) are more compact and portable, whereas the AF models, including the OTS100AF, feature a larger test chamber, alpha-numeric keypad, and barcode scanning options — ideal for laboratories that require high-volume, traceable testing.

Q3: What safety features does the OTS100AF include?

A. The instrument has dual redundant HV cut-off circuits and an ultra-fast HV switch-off time (<10 µs). The transparent lid is shielded for operator safety, and testing can be aborted instantly by pressing any key.

Q4: How should the test vessel be prepared?

A. Best practice is to rinse the vessel with the oil sample to be tested, avoid air bubbles during filling, and set the electrode gap using the supplied gauges. Megger recommends using separate vessels for different oil types to prevent contamination.

Q5: Can the OTS100AF integrate with data management systems?

A. Yes, the OTS100AF stores test data internally, transfers results via USB, and can integrate with LIMS using barcode scanning for sample identification. It also comes with PowerDB Lite software for asset and results management.

 

Comparison Chart for: Megger OTS100AF 100kV Auto Oil Test Set Basic Build c/w 400ml Vessel

OTS60PBOTS80PBOTS60AFOTS80AFOTS100AF
Configured to order options
Printer (built in) or not
Internal battery fitted or not
Mains / Line supply lead (plug)
Electrode set supplied (IEC ASTM or Universal)
Soft Padded carry case
OTS Range Differentiating Features
Max test voltage
60 kV
80 kV
100 kV
Power supply
Lead acid battery option
NiHM battery option
Vehicle 12 V skt lead option
Mains only operation
Data management
Internal test result memory
Download results to USB stick
Barcode scanning capability
Keypad for easy asset ID and memo entry
Ruggedness
Tough display and chamber lid
Low cost shatter proof test vessel
Large corner protecting rubber feet
Rugged non-flex construction
Transport
Transport case**
Protective carry case**
Light weight (<23 kg) one man carry
Operating costs
Low cost test vessel (Vessel of each oil **)
Annual full calibration
Test standards
Fast favourite list selection
Fully automatic test sequence
Test standards update via USB device ***
Custom tests
Cleanliness
Easy pour / clean vessel design
Large test chamber (easy access)
Test chamber spilt oil drain
Accuracy
Continuous oil temperature measurement
Lockable thumb wheel adjustable electrode gap
Voltage output verification unit available
*Optional item **IEC 60156 recommends a separate test vessel is used for each type of fluid to be tested ***Important future proof feature

 

Accessory Code Description Price (Ex VAT)
1001-102 Accessory Lid Mounted Impeller Supplied (for use with 400ml vessel only) £245.00 ADD
1001-105 VCM100D Voltage Check Meter £1,290.00 ADD
1001-473 Vessel 400ml (no electrodes) £305.00 ADD
1001-474 Vessel 150ml (no electrodes) £325.00 ADD
1001-477 Accessory IEC Electrode Set - Includes Mushroom and Sphere Electrodes Stirrer Bar Gap Gauge Set Magnetic Bean Retreiver all in Case £250.00 ADD
1001-478 ASTM Electrode Set - Includes Cylinder Electrodes Both std and None std Mushroom Electrodes Stirrer Bar Gap Gauge Set and Magnetic Bean Retreiver all in Case £290.00 ADD
1001-479 ASTM and IEC Electrode Set - Includes Cylinder Electrodes Both std and None std Mushroom and Sphere Electrodes Stirrer Bar Gap Gauge Set and Magnetic Bean Retreiver all in Case £335.00 ADD
1001-801 VCM80D Voltage Check Meter £1,260.00 ADD
1002-144 Electrode Spacer Set Spare (new OTS) £120.00 ADD
25995-002 Printer Ribbon Cassette £21.00 ADD
27890-009 Stirrer Bar Magnetic MS/F1 £16.00 ADD
6220-482 Pair of Mushroom Electrodes £106.00 ADD
6220-483 Pair of Cylindrical Electrodes £106.00 ADD
6220-484 Pair of Spherical Electrodes £106.00 ADD

 

 

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