# Water Quality Tester 4-in-1 LED Bigstern 23534 — Bigstern

**URL:** https://aio.lv/en/product--bigstern-5904665712474--11258617
**Data updated:** 2026-03-11 12:03 (EET)
**Category:** Digital thermometers
**Manufacturer:** Bigstern
**Manufacturer code:** 5904665712474
**EAN:** 5904665712474
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 15.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--bigstern-5904665712474--11258617

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Handheld 4-in-1 water quality tester Bigstern 23534 with LED display for measuring common water parameters. Designed to provide quick on-site checks of water suitability for household and hobby use, it detects multiple indicators in one device and shows readings via LED for easy interpretation. Suitable for basic testing of tap, aquarium, and pool water.

## Long description

The Bigstern Water Quality Tester 4-in-1 LED (model 23534) is a handheld device designed for quick on-site checks of common water parameters. It combines four measurement functions in a single compact instrument with an LED display for easy reading. The tester is intended for basic assessment of water suitability in domestic and hobby settings, including tap water, aquariums and small pools.
Advantages
This 4-in-1 tester provides multiple readings from one compact handheld unit, reducing the need for separate instruments. The LED display offers clear, immediate feedback for each measurement, enabling fast decisions about water use. The device is lightweight and portable, making it convenient for quick checks around the home, in aquaria, or at a pool. Designed for straightforward operation, it requires minimal setup and is suitable for non-professional users who need routine monitoring.
Suitable for
 Basic testing of tap water to check general quality
 Monitoring aquarium water for hobbyists
 Routine checks of small pools and spas
 Quick on-site water assessments during household maintenance
Key specifications
 Measurement functions: four common water parameters integrated into one device
 Display type: LED readout for numerical and status indications
 Form factor: handheld, portable design suitable for spot checks
 Power: battery-operated for field use (battery type and life depend on usage)
 Intended use: non-professional domestic and hobby water quality checks
How to use
Immerse the sensor end of the tester into the water sample according to the device’s markings, ensuring the probe is sufficiently covered. Power on the unit and wait for the LED display to stabilise; the tester will show measured values for each parameter sequentially or via dedicated indicators. Remove the probe after reading, power off the device, and dry the sensor before storage. For repeat measurements, rinse the probe with clean water to avoid cross-contamination between samples.
Usage recommendations
Use the Bigstern 4-in-1 tester for routine spot checks rather than as a substitute for laboratory analysis. Calibrate or validate measurement accuracy according to the manufacturer’s instructions when precise results are required. Store the tester in a dry place, avoid prolonged exposure to direct sunlight, and replace batteries when display dimming or inconsistent readings occur.

## FAQ

### How much does the Water Quality Tester Bigstern 23534 cost, and is it available for purchase?

The price is 18.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Bigstern products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Bigstern service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11258617/62174638_large.webp