Standard Fiber Optic ATR-Detachable Loop Probes


The ATR-Loop Infrared PIR-fiber probe was the first in FlexiSpec® product line designed for use with FTIR and other Mid IR spectrometers. ATR-Loop PIR-fiber probes are well-suited for remote analysis of composition of liquids, pastes and soft surfaces and do not require sample preparation. The Loop fiber probe is the simplest one in the FlexiSpec® product family to allow for low cost ATR-spectroscopy.

Main Features:

  • High throughput at Mid InfraRed range
  • On-line absorbance spectroscopy of liquids, pastes & soft solid surfaces
  • Compatible with all FTIR, QCL and IR- Filter spectrometers
  • Cost effective alternative to more expensive ATR-IR-fiber probes
  • Replaceable ATR Loop PIR-Fiber Tips


  • Remote evanescent absorption (ATR-) spectroscopy in-citu
  • Multiple ATR-spectroscopy by immersion of fiber loop in liquid
  • In-vivo molecular spectroscopy for medical diagnostics by simple touch of ATR-Loop on skin or tissue


Probe Type
ATR for Detachable-PIR-Loops
Probe Shaft OD = 10 mm, L = 80 mm
Shaft Material PEEK
Total Length 1.1 ± 0.05 m
Flexible Fiber 2 legs of 1.0 m length each
Terminations 2 x Ti-SMA905
Protection Tubing PEEK
Temperature 0 - +80°C
Pressure 0 - 3 Bar

Available SKUs:

Product Code
Tip Material Spectral Range Fiber Type
ATR-P-AgX-10-8-110/100 AP10100 PIR-fiber loop 600 - 3100 cm-1 PIR 900/1000
ATR-C-AgX-10-8-110/100 AP10106 PIR-fiber loop 1550 - 5000 cm-1 PIR 900/1000

Payment & Security

American Express Apple Pay Diners Club Discover Meta Pay Google Pay Mastercard PayPal Shop Pay Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Estimate shipping