Keeler D-KAT Digital Contact Applanation Tonometer

Quick Overview

The latest addition to the Keeler product portfolio is the D-KAT Digital Contact Applanation Tonometer. Based on the industry bench mark of the 'Goldmann Standard' of intraocular pressure (IOP) measurement.

Designed and manufactured in the UK to the exacting standards you would expect from a Keeler instrument. The Keeler D-KAT Digital Contact Applanation Tonometer delivers reliability and ease of use.

It operates according to the 'Goldmann Standard', by measuring intraocular pressure from the force required to flatten (applanate) a constant area (3.06mm) of the cornea.

This product provides a fast and accurate measure of IOP, with an LED display and internal electronics.

Available in both T-Type and R-Type forms. The T type is easily removable and allows for convenient usage on multiple slit lamps, while the R type can be directly fixed to a slit lamp.


  • The LED display and internal electronics allows for fast and accurate measurement of intraocular pressure (IOP). With fewer moveable parts, the D-KAT is far more reliable and accurate and recalibration takes only a few seconds.

Part Number

Keeler D-KAT Digital Applanation Tonometer T Type

Part #: 2414-P-2032

Keeler D-KAT Digital Applanation Tonometer R Type

Part #: 2414-P-2042


Keeler digital T type: for Haag Streit type illumination systems: Fitted to the guide plate on the optical axis for the microscope and illumination unit arm

Keeler digital R type: for some Zeiss type and Haag Streit type illumination systems Mountable on post on microscope

Installation: Assembled on the guide plate on the slit lamp arm or mounting post

Measurement range: 5–65 mmHg (0.66 – 8.46kPa)

Measurement deviation: 0.49 mN or 1.5% of measurement value, whichever is the greater

Operating temperature: range From 10ºC to 35ºC

Reverse span (Hysteresis): " 0.49 mN

Net Weight:

  • Keeler T type: 0.37 kg (without accessories)
  • Keeler R type: 0.58 kg (without accessories)


Environmental - Ambient Conditions


  • Temperature: -40ºC to +70ºC
  • Air Pressure: 500 hPa to 1060 hPa
  • Relative humidity: 10% to 95%


  • Temperature: -10ºC to +55ºC
  • Air Pressure: 700 hPa to 1060 hPa
  • Relative humidity: 10% to 95%


  • Temperature: +10ºC to +35ºC
  • Air Pressure: 800 hPa to 1060 hPa
  • Relative humidity: 30% to 75%


Keeler-D-KAT-luxury-carrying-case KAT Aluminium carrying and storage case
Part #: 3414-P-7010
Keeler-Tonometer-doubling-prism KAT doubling prism
Part #: 2414-P-5001
T-type-guide-plate KAT T type guide plate
Part #: 2414-P-5032
R-type-post KAT R type post
Part #: 2414-P-5042
keeler-calibration-arm-assembly Calibration arm assembly
Part #: 2414-P-5005
Part #: 1909-P-7129

Keeler D-KAT - Product Brochure



Keeler D-KAT Digital Contact Applanation Tonometer Instructions of Use