Dewar Neutral Supply Testers

Dewar Electronics Neutral and Supply Tester has been the industry standard since it was first released in 1995. Its rugged construction and reliability has served the electrical industry well.

The Dewar NST additional functions when compared to the previous model, include: 

  • LCD Screen to display measurement results and messages
  • 3 status LED’s: Power ON, PASS and FAIL
  • CAT IV 600V instrument compliance
  • Load Measurements taken over 4 full 50Hz cycles
  • IP54 moisture and dust ingress rating
  • Sleek new impact resistant case design
  • CAT IV 600V rated lead set
  • Neutral to Earth Voltage is 5.25V

One of the great features about the M1120 is that the power is taken directly from the users connections to the NST, so you don’t have to worry about flat batteries or battery replacement.

You can only purchase the Dewar NST from one of our ​distributors. 

Are you aware the Dwar Electronics Pty Ltd can carry out your annual NSW certification check

The certification check confirms that the instrument still meets all design specifications.  At the same time we will upgrade both hardware and firmware if required.  This will be done for a set fee of $120 + GST.  A freight charge may apply , depending on the quantity of units.

Contact Dewar on 03) 9725 3333 for further information.

Dewar Neutral Supply Tester Accessories

The M1120 Lead Set is designed specifically to work with the M1120 & M1121 NST.

​Features include:

  • 1.5mm double insulated, 20A rated PVC wire
  • PVC material is hard wearing & flexible
  • CAT IV rated
  • Probe 1KV CAT IV 16A
  • Crocodile clip 600V CAT IV 36A opening 32mm
  • 4mm male connector ends enables different application requirements

The M1110A Lead set is designed to specifically to work with the M1110A NST.

​Features include:

  • 1.5mm double insulated, 20A rated PVC wire
  • PVC material is hard wearing & flexible
  • CAT IV rated
  • Probe 1KV CAT IV 16A
  • Crocodile clip 600V CAT IV 36A opening 32mm
  • IEC input connector
  • 4mm male connector ends enables different application requirements

Keep your valuable NST, lead set, hanging clip and manual neat and safe all in one carry case!

Features include:

  • Polypropylene hard plastic material
  • Molded firm foam base to fit NST, lead set, hanging clip and manual
  • Egg carton shape fiam on the inner lid to hold items secure
  • 2 clip fasteners on the lid
  • Size 340mm x 280mm x 80mm
  • Black coloured case with Dewar logo
  • Total weight including the case, NST, lead set, hanging clip and manual 1.5kg approx.

The M1120 Case strap was designed for easily attaching the NST to all types of requirements.

Features include:

  • Strap made from strong seatbelt webbing.

The Dewar Electronics heavy duty earth electrode is a 306 grade stainless steel probe with an attached Trailing Reel which was designed to be used with the Dewar Neutral Supply Testers.

​Features of the Dewar Trailing Lead: ​ ​

  • UV Stabilised Polypropylene Reel
  • 1.5mm thick PVC Green/Yellow wire
  • PVC material for ease of rolling in and out and tangle free
  • Cat IV rated attachments
  • Industrial grade Terry clips to attach to the Earth Electrode
  • Made to order for 10-50 metre lengths.Features of the Dewar Earth Electrode:
  • 306 Grade Stainless Steel – inhibits rusting
  • 12mm diameter thick stake & 16mm diameter thick handle
  • Reinforcement added to top of handle to withstand hammering into ground
  • 450mm Length stake

Dewar Electronics Pty Ltd

32-34 Taylors Road
Croydon, Victoria, 3136
Phone: 03 9725 3333
Fax: 03 9725 6003
Email: sales@dewar.com.au

Contact us