--- product_id: 454360481 title: "RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid" brand: "soikoi" price: "£142.89" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/454360481-rcyago-dissolved-oxygen-meter-with-electrode-filling-fluid store_origin: GB region: United Kingdom --- # 0.0-40.0 mg/L dissolved oxygen range Auto power-off & low battery alert 0-40°C auto temp compensation RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid **Brand:** soikoi **Price:** £142.89 **Availability:** ✅ In Stock ## Summary > 💧 Measure with confidence, lead with precision. ## Quick Answers - **What is this?** RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid by soikoi - **How much does it cost?** £142.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/454360481-rcyago-dissolved-oxygen-meter-with-electrode-filling-fluid) ## Best For - soikoi enthusiasts ## Why This Product - Trusted soikoi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Extended Measurement Range:** Double the typical dissolved oxygen range (0-40 mg/L) for versatile aquatic and lab applications. - • **Precision Meets Portability:** Compact pen-shape design for on-the-go professionals who demand accuracy anywhere. - • **User-Friendly Digital Display:** Backlit screen delivers crystal-clear data visibility in any lighting condition. - • **Smart Temperature Compensation:** Automatic adjustment ensures reliable readings regardless of water temperature fluctuations. - • **Effortless Maintenance & Calibration:** Detachable probe with replaceable electrode heads and simple single/dual-point calibration keeps you testing without downtime. ## Overview The RCYAGO Dissolved Oxygen Meter DO9100 is a high-precision, portable instrument designed for professionals managing aquatic environments and labs. Featuring a broad dissolved oxygen measurement range up to 40 mg/L, automatic temperature compensation from 0 to 40°C, and a clear backlit digital display, it delivers fast, accurate readings. Its detachable probe system with replaceable electrode heads and easy calibration ensures long-term reliability. Ideal for aquaculture, water quality monitoring, and scientific research, this meter combines advanced technology with user-centric design to keep you ahead in water analysis. ## Description RCYAGO Portable Dissolved Oxygen AnalyzerFeature:1. With automatic temperature compensation that will automatically compensate for the solution temperature of 0-40 ℃, it can provide you with an accurate and stable reading.2. Suitable for freshwater culture, mariculture, swimming pool, beverage factory, wastewater treatment plant, and laboratory.3. Compact pen-shape design, lightweight for mobility, you can test water anywhere to get the purest water.4. High precision and fast response: fast to get the testing result and can test the value for any 0.0- 40.0mg/L liquid which you wanna test.5. Adopts the digital screen display with backlight, which is more clear and convenient to read data.Specification:Material: PlasticMeasuring Range:Dissolved: 0.0- 40.0mg/LDissolved oxygen saturation: 0.0-300.0%Temperature: 0.1-40.0°C; 32.0-104.0℉Resolution:Dissolved: 0.1mg/LDissolved oxygen saturation: 0.1%Temperature: 0.1°C; 0.1℉Accuracy:Dissolved: ±1.5%F.SDissolved oxygen saturation: ±1.5%F.STemperature: ±0.5°CCalibration mode: support single-point or dual-point automatic calibration, namely zero point or automatic 100% calibration in the air.Response Time: ≤45s (90% response at 20°C)Automatic Temperature Compensation Range: 0～40°CBattery Power: Low battery warningBacklight: Support automatic backlightPower: Automatic shut down about 8 minutesBattery: 3x1.5VLR44 BatteryUse environment: 0.1-40.0°C RH max 90%Size and Weight: 183x37x37mm (7.2x1.5x1.5in)/80gPackage List:1 x Dissolved Oxygen Meter1 x Electrode6 x Replaceable Electrode Head1 x 30mL Electrode Filling Fluid1 x Plastic Box1 x Manual ## Features - Dissolved oxygen meter is a precision instrument for measuring dissolved oxygen and temperature. The dissolved oxygen probe is a thin film with a polarographic sensor and a thermistor for temperature measurement and temperature compensation. The permeable membrane separates the measured solution from the sensing electrode but allows oxygen to pass through the membrane to react, and the concentration can be measured. - Dissolved oxygen refers to the concentration of molecular oxygen dissolved in water, generally expressed in mg/L (ppm) and saturation percentage (%), which is the percentage of dissolved oxygen in 1L of water. The oxygen concentration of our dissolved oxygen meter is 0.0-40.0mg/L, most of the range of dissolved oxygen meters on the market is 0.0-20mg/L. When measuring and calibrating, needn't open the protective cover of the electrode, just put the electrode in the solution for measurement. - Detachable probe, easy to replace, equipped with 6 probe protective covers and anaerobic water calibration powder. The film inside the protective cover cannot be taken apart. After using it for a period of time, the test value is inaccurate and the calibration is still inaccurate, and the membrane sleeve needs to be replaced. - Adopts the digital screen display with backlight, which is more clear and convenient to read data. Auto power-off in 8 minutes if not using it. Low battery indication. Oxygen solubility will be affected by temperature, atmospheric pressure, and salinity. Our instrument with temperature compensation can meet normal use. - It is very suitable for measuring the dissolved oxygen level and temperature in a wide range of aquariums, swimming pools, ponds, freshwater aquaculture, marine aquaculture, school teaching experiments, laboratory sterile environment, aquaculture, scientific research, and other fields. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | soikoi | | Special Feature | High Accuracy | | Colour | Black | | Age Range (Description) | Adult | | Included Components | Battery | | Outer Material | Plastic | | Specification Met | NSF | | Display Type | Digital | | Connectivity Technology | Usb | | Product Care Instructions | Wipe Clean | | Net Quantity | 1.0 Count | | Power Source | Battery Powered | | Model Name | DO9100 | | Item Length | 6.1 Inches | | Upper Temperature Rating | 4E+1 Degrees Celsius | | Response Time | 8000 Milliseconds | | Reusability | Rechargeable | | Resolution | 0.1 degrees_celsius | | Lower Temperature Rating | 0.1 Degrees Celsius | | Style | Digital | | Indoor/Outdoor Usage | Indoor | | UPC | 784104073213 | | Manufacturer | RCYAGO | | Model number | DO9100 | | Number of Memory Sticks | 1 | | Item Weight | 356 g | | Item model number | DO9100 | | Are batteries included? | No | ## Product Details - **Brand:** soikoi - **Special Feature:** High Accuracy - **Colour:** Black - **Age Range (Description):** Adult - **Included Components:** Battery ## Images ![RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - Image 1](https://m.media-amazon.com/images/I/51it+PYFPhL.jpg) ![RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - Image 2](https://m.media-amazon.com/images/I/61qDymmw9eL.jpg) ![RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - Image 3](https://m.media-amazon.com/images/I/613Ua8ORdUL.jpg) ![RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - Image 4](https://m.media-amazon.com/images/I/71Qg9tyLyGL.jpg) ![RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - Image 5](https://m.media-amazon.com/images/I/71LjLeeiS4L.jpg) ## Questions & Answers **Q: Is the probe submersible? I want to measure DO in the lower portions on a pond without having to try to capture samples.** A: The probe is submersible but not the top controller part. I spliced in a piece of 4 conductor cable to get it deeper. **Q: how long is the probe ?** A: The probe is five inches in length. **Q: Does this work in the mountains at 5,000 feet elevation?** A: The manual says it does not compensate for altitude/pressure. Only temperature. Its unclear if it would work properly at 5,000 feet. **Q: Does it come with a calibration solution or, how do you make anaerobic water?** A: I bought this thing recently for transporting fish/trout. Couple things to note I have found. No Calibration solution. I find it odd that the way you calibrate is against outside air. You calibrate it in air or zero it out against air. Then use it. I also found that it needs to be calibrated every use. I may try calibrating in a solution of saturated C02 ( in other words take all the oxygen out ) but I have no way of knowing just exactly when that may be. The temperature ( and if indeed the DO is accurate ) takes over a minute to be the same accuracy as analog pool thermometer. IDK if I ultimately trust this thing based on some things here. Does not make sense readings of 3mg/L in water supporting trout, when they need 6+ or they'd be jumping out of water and dying. So, not convinced the thing can be calibrated correctly in order to read correctly. Hope this answers any questions. ## Frequently Bought Together - RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid - API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored - Monitor DISSOLVED Oxygen Test KIT (50 Tests) - Monitor Aquarium and aquaculture Water Quality --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/454360481-rcyago-dissolved-oxygen-meter-with-electrode-filling-fluid](https://www.desertcart.co.uk/products/454360481-rcyago-dissolved-oxygen-meter-with-electrode-filling-fluid) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*