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Orion AQUAfast AQ3170

Portable chlorine colorimeter

Orion AQUAfast AQ3170

The Orion AQUAfast AQ3170 chlorine colorimeter is ideal for the dedicated free and total chlorine testing of water and wastewater and is designed to assist with US EPA testing compliance for free and total chlorine measurements of drinking water and wastewater samples. Using an LED light source at 530 nm, this colorimeter measures two free and total chlorine testing ranges of 0.02 to 2.00mg/L chlorine using powder DPD reagents and standard 24mm vials and 0.1 to 8.0mg/L chlorine using powder DPD reagents and new 10mm plastic vials. The AQUAfast AQ3170 chlorine colorimeter is CE certified, IP-67 waterproof and accepts Orion AQUAfast free and total chlorine powder DPD reagents, available as standard 100 individual powder packs and new bulk powder dispensers with refillable vials for 250 dispense counts each. The Orion AQUAfast primary and secondary chlorine standards are also now available as separate accessories for the AQUAfast AQ3170 chlorine colorimeter.



  • Convenient scroll-driven menu system

  • Automatic switch-off

  • 16 point internal data storage with date/time stamp

  • Easy-to-read, backlit display

  • One-time zero function

  • Waterproof design (IP67)

  • Angled, ergonomic design for easy bench top or hand-held use

  • Calibration to government or organizational standards (ex. NIST or ISO)

thermo scientific orion aquafast aqua fast aq3170 chlorine colorimeter free total astles acs

Technical Specifications:


Power Supply

4 AAA batteries (included)


0.02 to 2.00 mg/L

0.1 to 8.0 mg/L


0.01 mg/L

Testing Reagents

Powder packs

Light Source

LED, interference filter (IF) and photosensor in transparent cell chamber. Wavelength specifications of the IF: 530 nm Δλ = 5 nm


530±1 nm


Internal ring memory for 16 data sets

Dimensions (L x W x H)

15.5 x 7.5 x 3.5 cm 

Display Type

LCD with Backlight (on keypress)

Operating Conditions

5°C to 40°C (ambient)

Relative humidity: 30-90%

IP Rating


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