KYORITSU KEW 3121B Analog High-Voltage Insulation Tester | DC 2500 V, 2 / 100 GΩ auto-ranging, CAT IV 300 V / CAT III 600 V, hard case included
KYORITSU3121B
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KYORITSU KEW 3121B Analog High-Voltage Insulation Tester | DC 2500 V, 2 / 100 GΩ auto-ranging, CAT IV 300 V / CAT III 600 V, hard case included

KYORITSU KEW 3121B Analog High-Voltage Insulation Tester: DC 2500 V, 100 GΩ Overview The KEW 3121B is a KYORITSU analog high-voltage insulation tester with an analog meter for quick reading; ranges switch automatically and are indicated by LEDs. The supplied GUARD lead eliminates the effect of surface leakage on measurements. The same series also i

DC 2500 V; 2 GΩ / 100 GΩ auto-ranging, LED indication0.1–50 GΩ ±5%rdg; other ranges ±10%rdg or 0.5% of scale lengthCAT IV 300 V / CAT III 600 V; 8 × C batteries; approx. 1.6 kg
Corporate reference price (excl. tax)
Price on request
E-invoice issued after payment
One-year manufacturer warranty
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Overview

KYORITSU KEW 3121B Analog High-Voltage Insulation Tester: DC 2500 V, 100 GΩ

Overview

The KEW 3121B is a KYORITSU analog high-voltage insulation tester with an analog meter for quick reading; ranges switch automatically and are indicated by LEDs. The supplied GUARD lead eliminates the effect of surface leakage on measurements. The same series also includes the KEW 3122B (DC 5000 V, 5 / 200 GΩ) and KEW 3123A (DC 5000 / 10000 V, up to 400 GΩ); their specifications differ, so please request a separate quotation.

Key Specifications

  • Test voltage: DC 2500 V
  • Ranges: 2 GΩ / 100 GΩ auto-ranging
  • Accuracy: 0.1–50 GΩ: ±5%rdg; 0–0.1 GΩ and above 50 GΩ: ±10%rdg or 0.5% of scale length
  • Standards: IEC 61010-1, IEC 61010-2-030 CAT IV 300 V / CAT III 600 V; IEC 61010-031
  • Power and weight: DC 12 V (8 × C batteries); 177 × 226 × 100 mm, approx. 1.6 kg
  • Supplied accessories: 7165B line probe, 7264A earth lead, 7265A guard lead, 8019 hook probe, 9182 hard case

Applications

  • Insulation resistance measurement of high-voltage equipment such as motors, cables and transformers.

Specifications per the KYORITSU English-site product page and KEW 3121B / 3122B catalog (March 2015 edition); 3123A per the KEW 3121A / 3122A / 3123A catalog (retrieved 2026-10-21).

Specifications

Key specifications
DC 2500 V; 2 GΩ / 100 GΩ auto-ranging, LED indication0.1–50 GΩ ±5%rdg; other ranges ±10%rdg or 0.5% of scale lengthCAT IV 300 V / CAT III 600 V; 8 × C batteries; approx. 1.6 kg
Model
3121B
Brand
KYORITSU
Purchasing
In stock, tax incl. / B2B formal quotation request (RFQ)
Warranty
One-year manufacturer warranty

Calibration

If your instrument needs periodic calibration, register the brand, model and calibration requirements on the calibration service page and we will send a separate quote.

Go to calibration service