Atago 3354 Digital Suction-Type NaOH Refractometer, QR-NaOH Sodium Hydroxide, NaOH : 0.0 to 38.0% Measurement Range


Sodium hydroxide, also known as caustic soda or lye, is often prepared as solutions at different concentrations for a number of applications.The QR-NaOH allows the users to measure the concentrations without coming in contact with this alkali. Just plain tap water is sufficient for cleaning and zero-setting.

Model QR-NaOH
Cat.No. 3354
Scale NaOH
Measurement Range NaOH : 0.0 to 38.0%
Temperature : 5 to 40°C
Resolution NaOH : 0.1%
Temperature : 0.1°C
Measurement Accuracy NaOH : ±0.2 %
Temperature : ±1°C
(with sucrose solution)
Temperature compensation range 5 to 40°C(Automatic Temperature Compensation)
Ambient Temperature 5 to 40°C
Sample Volume At least 2mL
Materials Main body and detection section : ABS resin
Sample chamber cover : AS resin
Measurement Time Approximately 3 seconds
Power Supply 006P dry battery (9V)
International Protection Class IP64
Dust-tight and Protected against splashing water.
Included Accessories One 95 mm stainless pipe, one 95 mm silicon tube
Dimensions & Weight 70 × 40 × 210 mm (excluding nozzle), 300 g
The maximum possible length of nozzle: 130 mm
Quantity Break Pricing:
1 items £1125.00 / each  
2-4 items £1012.50 / each save 10%
5-9 items £843.75 / each save 25%
10 or more items £787.50 / each save 30%
  • £1125.00

Compact and easy to carry
Calibration with water
Battery operated
Digital display
Automatic Temperature Compensation

Sodium hydroxide, also known as lye and caustic soda,[1][2] is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+  and hydroxide anions OH−

Sodium hydroxide is a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air. It forms a series of hydrates NaOH·nH 2O. The monohydrate NaOH·H 2O crystallizes from water solutions between 12.3 and 61.8 °C. The commercially available "sodium hydroxide" is often this monohydrate, and published data may refer to it instead of the anhydrous compound. As one of the simplest hydroxides, it is frequently utilized alongside neutral water and acidic hydrochloric acid to demonstrate the pH scale to chemistry students

    • SKU
    • Commodity Codes
  • Measurement Range
    NaOH : 0.0 to 38.0%
  • Resolution
  • Measurement Accuracy
    ±0.2 %
  • Measurement Temperature (°C)
    5 to 40
  • Use
    Sodium Hydroxide (NaOH)
  • International Protection Class
  • Manufacturer
    Atago Co Ltd

Icons, for functions, specifications and scales have been added to this catalogue

Can be connected to a recorder Measurement at a set temperature
Can be connected to a printer Automatic Temperature Compensation
Alarm output for high- and low-limit values Can be connected to a circulating
RS232C Interface Continuous measurement
In-line measurement High temperature samples
User scales can be inputted External Light Interference


Specification Scale
Calibration with water Clinical refractometers
Calibration with exclusive standard liquid Refractive index scale
Compact and easy to carry Salt concentration scale
Digital display Seawater scale
AC outlet (AC100 to 240V) Wine scale
Battery operated