# HT Italia XL421 Single Phase TRMS Current Data Logger

# HT Italia XL421 Single Phase TRMS Current Data Logger

## Key Features At A Glance

-   Current measurement from 2 to 2500 A with 1 A resolution using true-RMS (TRMS) sensing
-   Measurement accuracy of ±(2.0% rdg + 2 dgt) at 50/60 Hz working frequency
-   RS-232 PC interface for downloading logged data
-   1 Mbyte internal memory with logging autonomy up to 1820 days at a 5-minute sampling period
-   Selectable sampling periods of 1 s, 6 s, 30 s, 1 min, and 5 min
-   IP65 protection and Class 2 double insulation (RS-232 connector closed)
-   Rated to IEC/EN 61010-1 CAT III 1000 V / CAT IV 600 V to ground
-   Battery-powered by two AA alkaline cells with over 6 months autonomy; ~500 g

The XL421 is a single-phase TRMS current data logger from HT Italia, designed to measure and record current using true-RMS sensing across a range of 2 to 2500 A with 1 A resolution. As a self-contained, battery-powered logging instrument, it captures current readings over time and stores them to internal memory for later download to a PC.

A current data logger records electrical current at set intervals over extended periods, so the measured values can be reviewed and analyzed after the recording session rather than read in real time. The XL421 supports unattended logging through selectable sampling periods and battery operation, with recording autonomy that extends from days to years depending on the chosen sampling period and battery life.

ValueTronics stocks and holds its own inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois, giving customers direct access to instruments we keep on hand.

## Product Core & Specifications

Specification

Value

Current (Accuracy at 23°C ± 5°C as ±(%readings + number of digits), <60%HR)

Range

2 ÷ 2500A

Resolution

1A

Accuracy

±(2.0%rdg + 2dgt)

Additional error due to not centering cable

2%rdg

Working frequency (Hz)

50±6%, 60±6%

Type of measure

TRMS

Bandwidth

3200Hz

Max crest factor

3

General Specifications

Sampling rate

64 point in 20ms for each sampling period

Sampling period

1s, 6s, 30s, 1min, 5min

Memory capacity

1Mbyte

Autonomy in days (depending on batteries autonomy)

5(1s) ; 34(6s) ; 170(30s) ; 364(1min) ; 1820(5min)

PC interface

RS-232

Operating Temperature / Humidity

\-20°C to 60°C ; 0 - 100%RH (RS-232 connector closed)

Storage Temperature / Humidity

\-20°C to 60°C ; 0 - 100%RH (RS-232 connector closed)

Insulation

class 2 (double insulation)

Altitude max

2000m

Protection degree

IP65 (RS-232 connector closed)

Power supply

2x1.5V alkaline battery type LR6-AA-AM3-MN1500

Battery autonomy

\>6months

Dimension

120 (L) x 80 (La) x 43 (H) mm

Maximum diameter conductor

174mm

Weight

about 500g (with internal batteries)

Reference Standards

LVD

IEC / EN 61010-1 CAT III 1000V (to ground) CAT IV 600V (to ground)

EMC

IEC / EN61326 (1997)+ A1 (1998) +A2 (2001)

> **Important:** Additional error due to not centering the cable: 2% of reading.

## About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 995.0 USD
- **Vendor:** HT Italia
- **Type:** Data Log
- **Tags:** Data Logger, HT Instruments, Manufacturers, Meters & DAQ, product_manual_group_1, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 995.00 USD | In stock |

## Images

- XL421 HT Instruments Data Logger

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> Source: [ValueTronics](https://valuetronics.com/products/xl421-ht-instruments-data-logger-new)
> Updated: 2026-06-27