Dewar Neutral Supply Tester

Dewar Electronics have been designing and manufacturing Neutral Supply Testers since 1995 and has been the industry standard since. Its rugged construction and reliability has served the electrical industry well and continues to do so with its M1120 V2 NST.

The Dewar Neutral Supply Tester (NST™)  measures volts, impedance and polarity in relation to the electrical grid supplies connected Active, Neutral and Earth to determine a safe or unsafe condition for industrial, commercial and domestic applications.

Extra benefits of the NST M1120-V2:

  • Microprocessor controlled for highest accuracy & reliability
  • Testing carried out over 4 Full 50Hz cycles
  • Easy to read 2 line LCD for results
  • Auto lock out for instrument protection if internal reference resistor over heats during repeated testing
  • Withstands accidental connection across 3 phases at 415V
  • High strength plastic enclosure with shatterproof decal that withstands 6M drop
  • Optional Bluetooth downloading capability
  • Optional certified version IP67 case
  • Size— 11cm W, 18.5cm H, 4.5cm D, 431.5g
  • Designed and manufactured in Melbourne, Australia.

Please download brochures for more information. 

Please contact one of our valued distributors if you wish to purchase the NST or accessories.  

 

Are you aware the Dewar Electronics Pty Ltd can carry out your annual NST 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 sales@dewar.com.au for further information.

Dewar NST Accessories

The M1120 high quality 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 Taylors Road
Croydon, Victoria, 3136

Phone: 03 9725 3333
Email: sales@dewar.com.au

Contact us