ET-234B earth resistance and soil resistivity tester

Earth Resistance Tester ET-23 / ET-234A / ET-234B, 2/3/4-Wire Ground Resistance Meter, up to 4000Ω

$58.80

$58.80 ~~$0.00~~

Three models: ET-23 2/3-wire · ET-234A adds 4-wire and low-ohms continuity · ET-234B adds Wenner soil resistivity
Earth resistance 0.030 - 4000 Ω with automatic range selection
Earth voltage 750 V AC, PV strings 1500 V DC, AC voltage 750 V
Low-ohms continuity ≥200 mA on ET-234A / ET-234B for bonding checks
Wenner soil resistivity 0.188 Ω·m - 753.6 kΩ·m on ET-234B, spikes and leads included

Model: ET-23

ET-23

ET-234A

ET-234B

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Estimated Delivery:Nov 14 - Nov 18
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
EU orders up to €150: VAT included — nothing to pay on delivery

Overview

Technical Specification

Shipping & Return

Product reviews

Earth resistance testers · 2 / 3 / 4-wire

The ET-23, ET-234A and ET-234B share one earth-testing platform and differ only in what they can measure. ET-23 does 2- and 3-wire earth resistance; ET-234A adds 4-wire measurement and a ≥200 mA low-ohms continuity mode for bonding checks; ET-234B adds Wenner soil resistivity on top. All three read earth voltage to 750 V AC, PV strings to 1500 V DC, and cover 0.030 Ω to 4000 Ω on a backlit 4000-count display.

2/3/4-wire
0.030–4000 Ω
Earth voltage 750 V
PV 1500 V DC
Wenner ρ
CE

Why it stands out

Three models, one measurement platformET-23 covers 2- and 3-wire earth resistance; ET-234A adds 4-wire measurement and a low-ohms continuity mode; ET-234B adds Wenner soil resistivity.
0.030 Ω to 4000 Ω, auto-rangingOne instrument spans bonding checks through to substation grounding grids, with resolution down to 0.001 Ω on the lowest range.
Earth voltage, PV and AC inputsEarth voltage to 750 V AC, photovoltaic strings to 1500 V DC and AC voltage to 750 V — check the site is safe before driving stakes.
Low-ohms continuity on ET-234A / ET-234BA ≥200 mA test current catches loose bonds and corroded clamps that a handheld multimeter misses, from 0.00 Ω to 120.0 Ω.
Wenner soil resistivity on ET-234BFour-electrode measurement from 0.188 Ω·m to 753.6 kΩ·m, using the four earth spikes and four leads already in the box.

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
Display	4000 counts, backlit	4000 counts, backlit	4000 counts, backlit
Weight	Approx. 760 g	Approx. 760 g	Approx. 760 g

All three models use the same housing, earth spikes and lead set. Choose the model in the variant selector above before adding to cart.

What's in the Box

#	Accessory	Qty
1	Earth resistance tester (ET-23 / ET-234A / ET-234B)	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

FAQ

Which of the three models do I need?

ET-23 handles 2- and 3-wire earth resistance for routine grounding checks. ET-234A adds 4-wire measurement — useful when lead resistance matters — plus a low-ohms continuity mode for bonding. ET-234B does everything ET-234A does and adds Wenner soil resistivity for substation and lightning-protection design.

What is the difference between 3-wire and 4-wire measurement?

The 3-wire fall-of-potential method is the standard field test. The 4-wire method adds a separate current and potential circuit, so the resistance of the test leads is cancelled out of the reading — worth the extra lead on low-resistance grids.

How does Wenner soil resistivity work?

Four spikes are driven in a straight line at equal spacing a. The meter injects current through the outer pair and reads the voltage across the inner pair, then computes ρ = 2πaRg. Varying the spacing gives the resistivity profile with depth.

Do I need extra accessories for soil resistivity?

No. The four earth spikes and four test leads supplied with ET-234B are exactly what the Wenner array needs — nothing else to buy.

What is Rk lead compensation for?

It stores the residual resistance of your own test leads. The meter subtracts it during measurement, which matters when you are reading fractions of an ohm on a bonding check.

Can it measure PV string voltage?

Yes. All three models accept 0 – 1500 V DC for photovoltaic strings and 0 – 750 V AC, so the site can be proved dead before any earth test begins.

Technical Specification

Earth resistance ranges	0.030 – 4.000 Ω / 0.03 – 40.00 Ω / 0.3 – 400.0 Ω / 3 – 4000 Ω (auto-ranging)
Earth resistance accuracy	±(2 % + 5 digits) typical; see manual for per-range tolerances
Earth voltage	0 – 750 V AC, 40 Hz – 500 Hz, ±(2 % + 5 digits)
PV / AC voltage input	0 – 1500 V DC / 0 – 750 V AC, ±(2 % + 3 digits)
Open-circuit voltage	≤ 48 V RMS
Test current	ET-23: ≈3 mA (40 Ω) / ≈2 mA (400 Ω) / ≈1 mA (4000 Ω)
Low-ohms mode	ET-234A / ET-234B only: 0.00 – 120.0 Ω, ≥200 mA when pre-Rk ≤ 16 Ω
Soil resistivity	ET-234B only: 0.188 Ω·m – 753.6 kΩ·m, ρ = 2πaRg, Wenner four-electrode
Lead compensation	Rk lead resistance compensation (ET-234A / ET-234B)
Display	69 × 42 mm LCD, 4000 counts, LED backlight
Auto power-off	After 30 minutes of no operation
Power supply	6 × 1.5 V AA alkaline batteries (included)
Dimensions	168 × 118 × 70 mm
Weight	Approx. 760 g (with batteries)
Overvoltage category	CAT II 1500 V (voltage measurement)
Certification	CE
Warranty	1 year (from date of purchase)

Shipping cost

Charged by the actual weight of your parcel — not a flat worldwide rate. Add items to the cart and the exact amount is calculated at checkout.

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.