---
product_id: 19459989
title: "Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater"
brand: "sper scientific"
price: "€ 437.77"
currency: EUR
in_stock: true
reviews_count: 1
category: "Sper Scientific"
url: https://www.desertcart.pt/products/19459989-sper-scientific-waterproof-dissolved-oxygen-meter-pen-850045-accurate-do
store_origin: PT
region: Portugal
---

# 0–20 mg/L dissolved oxygen range Auto temperature compensation 0–50°C IP65 waterproof durability Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater

**Brand:** sper scientific
**Price:** € 437.77
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead in precision—measure, adapt, and conquer every environment!

## Quick Answers

- **What is this?** Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater by sper scientific
- **How much does it cost?** € 437.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/19459989-sper-scientific-waterproof-dissolved-oxygen-meter-pen-850045-accurate-do)

## Best For

- sper scientific enthusiasts

## Why This Product

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

## Key Features

- • **Built for the Elements:** IP65-rated waterproof design ensures rugged performance in wet and demanding field conditions.
- • **Precision You Can Trust:** Measures dissolved oxygen with ±0.4 mg/L accuracy for reliable environmental insights.
- • **Portable Professionalism:** Compact, lightweight pen with one-hand operation and clear dual display for on-the-go efficiency.
- • **Complete Ready-to-Use Kit:** Includes spare probes, electrolyte solution, batteries, and a soft carrying case—everything a pro needs.
- • **Smart Temperature Compensation:** Automatic temp adjustment guarantees consistent readings from 32°F to 122°F without manual recalibration.

## Overview

The Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 delivers highly accurate dissolved oxygen and temperature readings with automatic temperature compensation. Its IP65 waterproof rating and rugged design make it ideal for environmental testing, aquariums, labs, and wastewater management. Compact and user-friendly, it comes as a complete kit with spare probes, electrolyte, batteries, and a carrying case, empowering professionals to perform reliable measurements anytime, anywhere.

## Description

Sper Scientific dissolved oxygen pen. Dissolved oxygen analysis is routinely performed in environmental testing, labs, industrial and municipal waste water, aquariums and fish hatcheries. This Sper Scientific dissolved oxygen pen is easy to carry, simple to calibrate and use. Sufficient for many surface dissolved oxygen measurements. Includes a soft carrying case with belt loop, two spare probe heads, electrolyte and 4 AAA batteries. IP-67 Waterproof. Simple one-hand operation. Automatic temperature compensation. Automatically calibrates to air. Easy to replace pop-off probe heads. Simultaneous display of dissolved oxygen and temperature. Hold and minimum/maximum recall. Grade level: middle-high school. No allergens. No choke hazard. 0 to 20.0 mg/L range; 0.1 mg/L resolution; +/-0.4 percent mg/L accuracy. 32 to 122 degree F range; 0.1 degree F resolution; +/-1.5 degree F accuracy. 0 to 50 degree C range; 0.1 degree C resolution; +/-0.8 degree C accuracy. CE Approved, RoHS Compliant.

Review: Easy to use and calibrate - I use this instrument 3-10 times daily and find it easy, accurate and rugged. It is very easy to calibrate and use.

## Features

- ACCURATE TESTING: Measures dissolved oxygen (0–20 mg/L) and oxygen percentage in air (0–100%) with high precision. Ideal for environmental testing, labs, aquariums, fish hatcheries, and wastewater management.
- WATERPROOF: Built to withstand tough conditions with IP65-rated waterproofing, ensuring reliability in wet environments like aquariums or fieldwork.
- ADVANCED FEATURES: Polarographic probe with a built-in temperature sensor offers automatic temperature compensation (32–122°F / 0–50°C) for consistent accuracy in every reading.
- EASY TO USE: Compact and portable with one-hand use, it features a clear display for simultaneous dissolved oxygen and temperature readings, plus data hold, max, and min memory recall.
- COMPLETE SET: Comes complete with 2 spare probe heads, electrolyte solution, 4 AAA batteries, and a soft carrying case with a belt loo - perfect for professionals on the go.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001EUB72K |
| Best Sellers Rank | #411,381 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #50 in Dissolved Oxygen Meters & Accessories |
| Date First Available | September 16, 2008 |
| Item Weight | 8 ounces |
| Item model number | 850045 |
| Manufacturer | Sper Scientific |
| Product Dimensions | 2 x 1.5 x 8 inches |

## Images

![Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater - Image 1](https://m.media-amazon.com/images/I/31d+A-CEhHL.jpg)
![Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater - Image 2](https://m.media-amazon.com/images/I/31holcoTcRL.jpg)
![Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater - Image 3](https://m.media-amazon.com/images/I/418KKD+j55L.jpg)
![Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater - Image 4](https://m.media-amazon.com/images/I/41T5BPz4e0L.jpg)
![Sper Scientific Waterproof Dissolved Oxygen Meter Pen 850045 - Accurate DO & Temperature Readings, IP65 Rated, Auto Temp Compensation - for Environmental Testing, Aquariums, Labs and Wastewater - Image 5](https://m.media-amazon.com/images/I/51JOWD0eZnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to use and calibrate
*by D***G on June 15, 2017*

I use this instrument 3-10 times daily and find it easy, accurate and rugged. It is very easy to calibrate and use.

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-02*