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Atomic absorption spectrometer

235ATS Atomic Absorption Spectrometer

$17,955.00 $19,950.00

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Take advantage of the Buck February inflation buster sale!
During February when you buy a Buck Instrument, you will get 10% off the
instrument, and all accessories and service for the life of the instrument! 
Promotion ends February 28th, 2023.

Just say No to service contracts, save your money!

We get a lot of calls from frustrated big brand customers. They have essentially just paid for their instrument three times in seven years with an expensive $6K/year service contract, and now they have no instrument due to parts being unavailable. This is criminal, and we feel for you if this is why you are in the market for an AA.  If you are looking for the opposite experience then we are here to help,  Buck Atomic Absorption spectrometers are built to be simple and reliable, so you don’t need to waste money on service contracts, save that money for raises, or a new company car.  

The Buck 235ATS is the perfect unit for plating shops, mines in rugged locations, oil refineries, classrooms, and silicone chip manufacturers. Click here to see some of our customers.

The 235ATS is designed for analysts requiring nitrous oxide to run Al, Si, Ga, Ge Ba, Be, Ti, Va, Zr, Nb, Mo, Hf, Ta, and W. The automated gas box (seen below) allows for push button oxidant change-over from Air to Nitrous oxide for safety. The 235ATS also features a flame detector which will turn the gases off shall the flame extinguish.
Atomic Absorption Spectrometer

Ease of Use

The ATS (Automated Touch Screen) line from Buck is designed to be reliable, easily serviceable, and easy to use.  The new ATS line offers conveniences like:


  • 10" color touchscreen
  • Automated wavelength selection
  • Automated Slit selection
  • Easy to operate 5 tab GUI (Graphical User Interface)
  • Automatic gas box for easy changeover from Air to N2O (235ATS Only)
  • Push button ignition
  • Emergency gas shut-off in case of flame outage (235ATS Only)
  • 4 USB ports for printer, mouse, and keyboard
  • Stable, Reliable, & Easy to use.
  • 3 lamp turret with 3 lamp power supply,
  • High energy optical design for better As & Se results
  • Compact size and light weight
  • Military grade design stands up to years of corrosive environment usage.
  • D2 Background correction
  • Low cost consumables and maintenance
  • Manufactured and supported in the USA
  • No service contract needed
  • Free In-House training for the life of the instrument
  • CE Certified
  • Leasing options available (USA ONLY)

 Analytical Performance

The New 235ATS continues Buck's long tradition of making dual beam Atomic absorption spectrometers with in-line Deuterium background correction. Our efficient optical design gives our systems superior energy, and better results for Arsenic and Selenium, than double beam Atomic Absorption Spectrometer systems without the need for high cost EDL lamps. Our simple design also allows our instruments to have a smaller footprint and lighter weight than our competitors.

Atomic Absorption Spectrometer optical layout

The Buck short-path dynamic nebulizer-burner configuration seen below is highly efficient. An inert needle, precisely positioned in a high flow venturi, delivers sample to the corrosion proof impact bead. This results in a tremendously high nebulization effect for all types of sample matrices.

Ease of Service

The 230ATS is hands down the easiest Atomic Absorption spectrometer to service, we have made all of the wear and tear components easily accessible, and the front panel is on tracks that allow the service engineer to slide it forward to replace components. Our founder Bob Anderson was a big brand service engineer that was tired of fixing instruments for simple design flaws, and was ignored by management when he proposed design changes. This is why you will not find a cheap component inside our Atomic absorption systems.  We would rather make less money then sell an inferior instrument.

Caring Support

Buck has been family owned and operated since 1970, which means we actually care about keeping you up and running. Once you buy a Buck instrument you will be treated like family, not a customer support ticket.  We answer our own phones, and respond to all emails within 24 hours or less.  

We can help you with problems over the phone, via zoom or email.  Most domestic customers send their AA to us for service here in Norwalk, CT via FedEx ground, which saves customers thousands of dollars. We have international distributors which can assist you with after sales service as well if you are an international customer. Every instrument comes with Free In-House training for the life of your instrument, we will even buy you lunch!


How to Set Up the 235ATS Atomic Absorption Spectrometer

Copper Calibration using the 230ATS Atomic Absorption Spectrometer


235ATS Atomic Absorption Spectrometer Brochure

 Atomic Absorption Spectrometer Pre-Installation Guide

 235ATS Atomic Absorption Spectrometer Manual


Wavelength Range: 190 to 900nm, Accuracy ± 0.2nm, Precision ± 0.1nm
Monochromator / Optics: 250mm Ebert mount, 600 lines/mm grating, 0.2-0.7-2.0nm bandpass
Hollow Cathode Lamp Supply: Triple HCL power supply; 3 to 75 mA peak.  The 225ATS has a three lamp design.
Background Correction: Deuterium - In-Line (see-through) configuration, pulsed illumination, hot cathode, variable frequency, corrects from 190-350nm (0.7nm slit). 
Burner / Nebulizer: Polypropylene spray chamber with pre-mix burner and high efficiency adjustable nebulizers (SS), Titanium burner heads for Air/Acetylene, Argon/Hydrogen and Nitrous Oxide/Acetylene operation.
Microprocessor: Computer control by 80C188 chip, 8/16 bit operation, 12/24 MHz clockspeed; non-volatile SRAM storage of >200 method files.
Integration / Response Range: User selectable times from 0.5 to 10 seconds for continuous (flame) and transient (furnace, hydride) signals.
Calibration: Automatic, weighted least squares fit to 1st, 2nd, 3rd, or 4th order functions, up to 8 points.
Display: 10" Color touchscreen
Output Modes: USB x 4
Dimensions / Weight: 39"L x 11"W x 12"H; 50 lbs (81 lbs shipping weight)
Power Supply: 100-240 VAC operating range, 50/60 Hz AC, <150 watts

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