Keeler D-KAT Z-Type Digital Contact Applanation Tonometer

Quick Overview

This product is a world first from Keeler, a company that have been leading the way in optical innovation for nearly a century and the latest addition to their range of Contact Tonometers is certainly no exception.

Keeler are proud to launch the world’s first Digital Contact Applanation Tonometer, designed specifically for Zeiss type Slit Lamps. British made, the D-KAT Z-Type is reliable and easy to use, providing tonometry at its very best.


  • The D-KAT Z-type 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.
  • The LED display enables ease of use in darkened environments, whilst the internal electronics allow the fast and accurate measurement of IOP. Plus, with less moving parts, the D-KAT Z-type is more reliable, accurate and recalibration takes just seconds.

Part Number

Keeler D-KAT Z-Type Digital Contact Applanation Tonometer

Part #: 2414-P-2010


Keeler digital Z-type for Zeiss type illumination systems: Mountable on post on microscope

Installation: Assembled on the guide plate on the slit lamp

Measurement range: 5 - 65 mmHg (0.66 - 8.65kPa)

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

Operating temperature range: From 10°C to 35°C

Reverse span (Hysteresis): ≤ 0.49 mN

Net weight: Keeler digital Z-type 0.6 kg (without accessories)


Environmental- Ambient Conditions


  • Temperature: -40°C to +70°C
  • Air pressure: 500 hPa to 1060 hPa
  • Relative humidity: 10% to 95%


  • Temperature: -10°C to +55°C
  • Air pressure: 700 hPa to 1060 hPa
  • Relative humidity: 10% to 95%


  • Temperature: +10°C to +35°C
  • Air pressure: 800 hPa to 1060 hPa
  • Relative humidity: 30% to 75%

Test arm assembly

Part #: 2414-P-5045


Tonometer doubling prism

Part #: 2414-P-5001


Z-type post (R)

Part #: 2414-P-5038


Keeler D-KAT Z-Type - Product Brochure