Earth Testers

SANWA earth testers measure earth resistance for maintenance and installation work, in a six-AA analog model and a backlit digital model. Bhumika is SANWA’s authorized Canadian distributor and provides quotes for Canada.

Which earth testers does Bhumika supply?

SANWAPDR302SANWA PDR302 Analog Earth Tester

Analog earth resistance tester with 10, 100 and 1000 Ω ranges.

Analog
10 / 100 / 1000 Ω
ACV 30 V

10 / 100 / 1000 Ω · ACV 30 VView specifications →

SANWAPDR4000SANWA PDR4000 Digital Earth Tester

Backlit digital earth tester with 40, 400 and 4000 Ω ranges.

Digital
40 / 400 / 4000 Ω
3-pole / 2-pole

40 / 400 / 4000 Ω · approx. 2 mAView specifications →

Compare models

Figures are shown only where SANWA publishes them. “Not stated” means SANWA does not publish a figure for that model — it does not mean the instrument lacks the capability.

Model	Type	Earth resistance ranges	Power	Size / mass
PDR302	Analog	10 / 100 / 1000 Ω	R6P (AA) 1.5 V × 6	H175 × W118 × D55 mm / approx. 500 g
PDR4000	Digital	40 / 400 / 4000 Ω	R6P (AA) 1.5 V × 6	H163 × W102 × D50 mm / approx. 440 g

What should I consider before buying?

Choose PDR4000 for a backlit digital display, 40/400/4000 Ω ranges, 3-pole or 2-pole measurement and interference-voltage readings. Choose PDR302 for an analog meter with 10/100/1000 Ω ranges and an AC 30 V range. Both run on six AA cells; PDR4000 is about 440 g and PDR302 about 500 g.

What do buyers usually ask?

Which earth tester is digital?

PDR4000 is the digital model, with 40, 400 and 4000 Ω ranges, an approx. 2 mA measuring current and a backlit display. PDR302 is the analog model.

Can PDR4000 do 2-pole measurement?

Yes, 3-pole and 2-pole measurement are both supported; SANWA states the optional TL-68 is needed for 2-pole.

Does PDR302 measure voltage?

PDR302 has an AC 30 V range, which SANWA describes as helping avoid indication errors caused by leak current.