ET-234B earth resistance and soil resistivity tester

Electrical Safety Testers — Insulation & Earth Resistance Testers, IT & ET Series

$32.60

$32.60 ~~$0.00~~

Insulation testing 100 V to 2500 V DC, autoranging to 10 or 20 GΩ
Earth resistance 0.030-4000 Ω in 2-, 3- and 4-wire methods
Low-ohms continuity ≥200 mA and Wenner soil resistivity on ET-234A/ET-234B
Separate AC 20-600 V input to prove the circuit is dead first
PV strings to 1500 V DC, CAT III 600 V / CAT II 1500 V, CE

Model: IT-1000

IT-1000

IT-2500B

ET-23

ET-234A

ET-234B

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Estimated Delivery:Nov 16 - Nov 20
Tracked shipping · rate by parcel weight
Delivery to 9-15 business days (tracked)
Dispatched within 1–3 business days after payment is confirmed
15-day returns on unopened instruments · Refund Policy
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Overview

Technical Specification

Shipping & Return

Product reviews

Insulation & earth resistance testers · five models

One product family for proving an electrical installation is safe: the IT-1000 and IT-2500B apply 100 – 2500 V DC and read insulation resistance to 20 GΩ, while the ET-23, ET-234A and ET-234B measure earth resistance from 0.030 Ω to 4000 Ω, with low-ohms continuity and Wenner soil resistivity on the top model.

100–2500 V DC
Up to 20 GΩ
0.030–4000 Ω
PV 1500 V DC
CAT III 600 V
CE

Why it stands out

Insulation testing 100 V to 2500 V DCIT-1000 covers 100 / 250 / 500 / 1000 V to 10 GΩ; IT-2500B reaches 500 / 1000 / 1500 / 2500 V and 20 GΩ for MV apparatus.
Earth testing, two to four wiresET-23 does 2- and 3-wire fall-of-potential; ET-234A and ET-234B add 4-wire measurement for grids where lead resistance matters.
Continuity that finds bad bondsET-234A and ET-234B push ≥200 mA through the loop — enough to expose corroded clamps a multimeter reads as "fine".
Soil resistivity on ET-234BWenner four-electrode measurement from 0.188 Ω·m to 753.6 kΩ·m, using the spikes and leads already in the box.
One platform per disciplineInsulation and earth models share the same 168 × 118 × 70 mm housing, 6 × AA cells and CAT III 600 V / CAT II 1500 V safety.

Insulation testers: IT-1000 vs IT-2500B

Feature	IT-1000	IT-2500B
Test voltages	100 / 250 / 500 / 1000 V DC	500 / 1000 / 1500 / 2500 V DC
Max insulation resistance	10.00 GΩ	20.00 GΩ
Insulation accuracy	±(3 % + 5 digits)	±(3 % + 5 digits)
AC voltage input	20 – 600 V, 40 – 400 Hz	20 – 600 V, 40 – 400 Hz
Typical use	LV motors, cables, telecom	MV/HV cables, switchgear, transformers

Earth testers: ET-23 vs ET-234A vs ET-234B

Feature	ET-23	ET-234A	ET-234B
Wire methods	2 / 3-wire	2 / 3 / 4-wire	2 / 3 / 4-wire
Earth resistance range	0.03 – 4000 Ω	0.030 – 4000 Ω	0.030 – 4000 Ω
Low-ohms continuity	—	≥ 200 mA	≥ 200 mA
Soil resistivity (Wenner)	—	—	0.188 Ω·m – 753.6 kΩ·m
Earth voltage	0 – 750 V AC	0 – 750 V AC	0 – 750 V AC
PV / AC voltage	1500 V DC / 750 V AC	1500 V DC / 750 V AC	1500 V DC / 750 V AC

What's in the Box

Insulation models (IT-1000 / IT-2500B)

#	Accessory	Qty
1	Insulation tester	1
2	High-voltage test probe	1
3	Mini crocodile-clip test lead	1
4	Test lead and clip set	1
5	1.5 V AA alkaline batteries	6
6	User manual	1
7	Nylon carrying pouch	1

Earth models (ET-23 / ET-234A / ET-234B)

#	Accessory	Qty
1	Earth resistance tester	1
2	Earth spike (ground rod)	4
3	Test lead with banana plug and crocodile clip — red 15 m, yellow 10 m, green 5 m, black 5 m	4
4	1.5 V AA alkaline batteries	6
5	User manual	1
6	Nylon carrying pouch	1

Applications

PV and storage commissioning, motor and transformer maintenance, substation and lightning-protection testing, telecom tower earthing, industrial grounding audits and acceptance testing of new installations.

Solar / PV
Substation
Motors
Telecom
Industrial
Acceptance

FAQ

How do I choose between the insulation and earth models?

Insulation testers (IT) apply a DC voltage and measure leakage resistance — for motors, cables, switchgear, transformers. Earth testers (ET) inject a current into the ground and measure the resistance of the electrode system — for substations, lightning protection, telecom towers and PV arrays. If you commission electrical installations you usually need both.

IT-1000 or IT-2500B?

IT-1000 covers the voltages used in low-voltage maintenance — 100 to 1000 V DC to 10 GΩ. Choose IT-2500B when equipment is rated above 1 kV: it reaches 2500 V DC and 20 GΩ.

ET-23, ET-234A or ET-234B?

ET-23 handles 2- and 3-wire earth resistance for routine checks. ET-234A adds 4-wire measurement plus a ≥200 mA low-ohms continuity mode. ET-234B adds Wenner soil resistivity for substation and lightning-protection design.

Can the insulation testers verify a circuit is dead first?

Yes. Both IT models have a separate AC voltage input covering 20 – 600 V, 40 – 400 Hz, on the same sockets used for testing.

Do the earth testers measure PV string voltage?

Yes. All three ET models accept 0 – 1500 V DC and 0 – 750 V AC, so the array can be proved dead before any earth test.

What is included?

Insulation models: high-voltage probe, mini crocodile-clip lead, test lead and clip set, 6 × AA, manual, nylon pouch. Earth models: 4 earth spikes, 4 test leads (red 15 m, yellow 10 m, green 5 m, black 5 m), 6 × AA, manual, pouch.

Technical Specification

Insulation resistance testers (IT-1000 / IT-2500B)

Insulation · IT-1000 ranges	100 V: 0.000 MΩ – 1000 MΩ · 250 V: –2.50 GΩ · 500 V: –5.00 GΩ · 1000 V: –10.00 GΩ (auto-ranging)
Insulation · IT-2500B ranges	500 V: 0.000 MΩ – 5.00 GΩ · 1000 V: –10.00 GΩ · 1500 V: –15.00 GΩ · 2500 V: –20.00 GΩ (auto-ranging)
Insulation accuracy	±(3 % + 5 digits) below range top; ±(5 % + 5 digits) above
Test current	> 1 mA
AC voltage	20 – 600 V AC, 40 – 400 Hz, ±(2 % + 5 digits)

Earth resistance testers (ET-23 / ET-234A / ET-234B)

Earth · resistance ranges	0.030 – 4.000 Ω / 0.03 – 40.00 Ω / 0.3 – 400.0 Ω / 3 – 4000 Ω (auto-ranging)
Earth voltage	0 – 750 V AC, 40 – 500 Hz, ±(2 % + 5 digits)
PV / AC voltage input	0 – 1500 V DC / 0 – 750 V AC, ±(2 % + 3 digits)
Low-ohms mode	ET-234A / ET-234B: 0.00 – 120.0 Ω, ≥200 mA when pre-Rk ≤ 16 Ω
Soil resistivity	ET-234B: 0.188 Ω·m – 753.6 kΩ·m, ρ = 2πaRg (Wenner)
Lead compensation	Rk lead resistance compensation (ET-234A / ET-234B)

Shared specification

Display	69 × 42 mm LCD, 2000 counts (IT) / 4000 counts (ET), LED backlight
Auto power-off	10 min (insulation) / 30 min (earth)
Power supply	6 × 1.5 V AA (LR6) alkaline batteries (included)
Dimensions	168 × 118 × 70 mm
Weight	Approx. 670 g (IT) / 760 g (ET)
Overvoltage category	CAT III 600 V (IT) / CAT II 1500 V (ET)
Certification	CE
Warranty	1 year (from date of purchase)

Shipping cost

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Dispatch & delivery

Orders are processed within 1–3 business days after payment is confirmed.
Shipped with a tracked, battery-certified registered service.
Transit time depends on destination — the estimated delivery window under the buy button is calculated for your address.
Need it faster, or shipping a high-value order? Commercial express (DHL / FedEx / UPS) can be arranged on request.

Returns

Unopened instruments may be returned within 15 days of delivery. Used devices are accepted only for verified quality issues. Full terms are in our Refund Policy.