---
title: DHT-400 Plus Handheld Hardness Tester
url: https://shop.opti-tech.ca/product/dht-400-plus-handheld-hardness-tester/
date: 2024-07-24T19:50:27+00:00
modified: 2025-12-30T19:40:06+00:00
lang: en_US
---

# DHT-400 Plus Handheld Hardness Tester

The DHT-400 Plus Integrated Hardness Tester utilizes state-of-the-art micro-electronic technology. This uniquely designed pocket-size instrument comes with a pocket-sized carrying case and incorporates a hardness impact probe, microprocessor, and data display in a single, compact unit. The main new features of DHT-400 include data display with statistics, enlarged storage capacity, a USB interface for recharging and data transfer to your PC or printer, an OLED display for use in dark areas, and much more. The DHT-400 Plus conforms to ASTM A956 and provides exceptional reliability for a wide measuring range, and is capable of automatically converting and displaying measurements into Rockwell, Brinell, Leebs, Vickers, and Shore hardness values.