---
product_id: 30125877
title: "30073971 ST20 Pen Meter"
brand: "ohaus"
price: "NZ$337"
currency: NZD
in_stock: true
category: "Ohaus"
url: https://www.desertcart.nz/products/30125877-30073971-st20-pen-meter
store_origin: NZ
region: New Zealand
---

# Fast dual-display readings IP67 waterproof durability 5-in-1 multiparameter measurement 30073971 ST20 Pen Meter

**Brand:** ohaus
**Price:** NZ$337
**Availability:** ✅ In Stock

## Summary

> 📊 Precision meets portability—measure like a pro, anywhere, anytime!

## Quick Answers

- **What is this?** 30073971 ST20 Pen Meter by ohaus
- **How much does it cost?** NZ$337 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/30125877-30073971-st20-pen-meter)

## Best For

- ohaus enthusiasts

## Why This Product

- Trusted ohaus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Energy Saver:** Auto-shutdown extends battery life for marathon field sessions
- • **Ultra-Portable & Ergonomic:** Slim design with wrist strap for effortless single-handed use on the go
- • **Lightning-Fast Dual Displays:** Instant, accurate readings with automatic temperature compensation
- • **Rugged IP67 Waterproof Build:** Drop it, dunk it, trust it—built for the toughest environments
- • **Versatile 5-in-1 Measurement:** pH, ORP, conductivity, salinity & temperature in one sleek device

## Overview

The OHAUS ST20 Pen Meter is a compact, durable, and waterproof multiparameter device designed for professionals needing fast, accurate measurements of pH, ORP, conductivity, salinity, and temperature. Featuring dual displays, automatic temperature compensation, quick calibration, and energy-efficient auto-shutdown, it’s ideal for lab, classroom, and fieldwork environments.

## Description

Accurate Electrochemistry Measurement At Your Fingertips. After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction.

## Features

- MULTIPARAMETER FUNCTIONALITY FOR VERSATILITY – Measures pH, ORP, conductivity, salinity, and temperature, catering to diverse laboratory, classroom, and fieldwork needs.
- WATERPROOF AND DURABLE DESIGN – IP67-rated construction ensures the pen meter can withstand accidental drops into liquids and rough handling in demanding environments.
- FAST AND ACCURATE MEASUREMENTS – Equipped with dual displays, automatic temperature compensation, and a quick calibration system for efficient and reliable data collection.
- PORTABLE AND LIGHTWEIGHT – Slim, compact design with a wrist strap for enhanced portability, allowing single-handed operation and easy transportation.
- ENERGY-EFFICIENT OPERATION – Features auto-shutdown to preserve battery life, ensuring extended usability during long fieldwork or research sessions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B013UEV94I |
| Best Sellers Rank | #170,574 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #167 in Lab pH Meters |
| Date First Available | August 12, 2015 |
| Item Weight | 2 pounds |
| Item model number | ST20 |
| Manufacturer | Ohaus |
| Product Dimensions | 9 x 3 x 2 inches |

## Images

![30073971 ST20 Pen Meter - Image 1](https://m.media-amazon.com/images/I/51JCSnXmYfL.jpg)

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**Shop now:** [https://www.desertcart.nz/products/30125877-30073971-st20-pen-meter](https://www.desertcart.nz/products/30125877-30073971-st20-pen-meter)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-07-04*