# On Call GK Dual Strip Compatibility Guide: Glucose vs Ketone Test Strips **By Dr Pramod kumar** · 2026-09-26 The **On Call GK Dual** is different from a standard glucose-only meter because it can perform both **blood glucose and blood β-ketone tests**. However, these two tests require **different compatible test strips**. The most important GK Dual compatibility rule is: **Glucose test → compatible On Call glucose strip Ketone test → On Call Blood Ketone Test Strip** ACON currently specifies **On Call Chosen** or **On Call Advanced Blood Glucose Test Strips** for glucose testing with GK Dual, while **On Call Blood Ketone Test Strips** are used for blood β-ketone testing. For the full meter overview, read: [**On Call GK Dual Glucose & Ketone Monitor Complete Guide →**](/blogs/knowledge-hub/on-call-gk-dual-glucose-ketone-monitor-complete-guide) * * * ## On Call GK Dual Compatibility at a Glance Strip GK Dual Use Compatible? On Call Chosen Blood Glucose Test Strips Blood glucose **Yes** On Call Advanced Blood Glucose Test Strips Blood glucose **Yes** On Call Blood Ketone Test Strips Blood β-ketone **Yes** On Call Plus Test Strips Blood glucose **Do not substitute** On Call Extra Test Strips Blood glucose **Do not substitute** Always follow the compatibility information provided with the actual meter and strip product supplied to you. * * * ## Which Glucose Test Strips Work with On Call GK Dual? The manufacturer currently identifies two compatible glucose strip families: - **On Call Chosen Blood Glucose Test Strips** - **On Call Advanced Blood Glucose Test Strips** Either designated system can be used for blood glucose testing with the compatible GK Dual meter according to its specific strip instructions and coding procedure. Do not purchase another On Call strip solely because it carries the On Call brand name. * * * ## Which Ketone Strips Work with On Call GK Dual? For blood β-ketone testing, use: **On Call Blood Ketone Test Strips.** These strips contain the reagent system required for the meter to measure blood β-ketone concentration. Microsidd currently supplies a **25-strip individually foil-wrapped pack**: [**Shop On Call Blood Ketone Test Strips 25 →**](/products/ketone-monitor-strips) * * * ## Do Ketone Strips Also Measure Glucose? No. On Call Blood Ketone Test Strips are designed for **blood β-ketone measurement**. They should not be used as a glucose strip. For glucose testing, use a compatible On Call Chosen or On Call Advanced glucose strip. * * * ## Do Glucose Strips Measure Ketones? No. The compatible Chosen or Advanced glucose strip measures **blood glucose**. It does not replace the separate On Call Blood Ketone Test Strip required for β-ketone testing. The meter is dual-function; the individual strips are **test-specific**. * * * ## Glucose vs Ketone Strips: Key Differences Feature Glucose Strip Ketone Strip Measurement Blood glucose Blood β-ketone Compatible families On Call Chosen / On Call Advanced On Call Blood Ketone Approx. GK Dual sample 0.8 µL 1.2 µL Approx. result time 5 seconds 10 seconds Result unit mg/dL or mmol/L according to market configuration mmol/L Same strip? **No** * * * ## Can On Call Plus Test Strips Be Used with GK Dual? ACON's current GK Dual compatibility information specifies **On Call Chosen or On Call Advanced glucose strips**. Therefore, do not substitute On Call Plus Test Strips simply because the meter and strips share the On Call brand. If your meter is actually an On Call Plus model, use: [**On Call Plus Test Strip Compatibility Guide →**](/blogs/knowledge-hub/on-call-plus-test-strips-compatibility-guide) * * * ## Can On Call Extra Test Strips Be Used with GK Dual? Do not substitute On Call Extra Test Strips. The current manufacturer compatibility specification for GK Dual identifies Chosen and Advanced as its glucose strip options. If your meter is On Call Extra, see: [**On Call Extra Test Strip Compatibility Guide →**](/blogs/knowledge-hub/on-call-extra-test-strips-compatibility-guide) * * * ## Why Doesn't Every On Call Strip Work in Every On Call Meter? On Call is a product family containing multiple meter-and-strip platforms. Examples include: - On Call Plus - On Call Extra - On Call GK Dual - On Call Chosen - On Call Advanced The brand name alone therefore does not establish compatibility. Each meter should be paired with the test-strip system specified by the manufacturer. * * * ## How to Identify Whether a Strip Is for Glucose or Ketones Read the complete product name on the strip packaging. ### For glucose testing Look for the specified: - On Call Chosen Blood Glucose Test Strips, or - On Call Advanced Blood Glucose Test Strips. ### For ketone testing Look for: **On Call Blood Ketone Test Strips.** Do not identify a strip solely by packaging colour or physical appearance. * * * ## Does GK Dual Use a Code Chip? Yes. GK Dual uses the corresponding **code chip supplied with the strip system**. When starting a new box, follow the meter instructions and make sure the correct code information is loaded before testing. * * * ## On Call Advanced Code Identification The GK Dual manual states that the glucose code associated with **On Call Advanced Test Strips begins with the letter A**. Always confirm that the displayed code corresponds with the strip supply being used. * * * ## On Call Chosen Code Identification For **On Call Chosen Test Strips**, the manual states that the glucose code begins with the letter **H**. Do not use the code information from one strip family with another. * * * ## Does the Ketone Strip Need Its Own Coding? Yes. The meter separately stores the applicable ketone code information. When changing to a new ketone strip supply, follow the code-chip instructions included with that product and verify the code displayed by the meter. If the meter has no stored ketone code, the manual indicates that a ketone strip can cause the display to show a missing-code indication rather than proceeding normally. * * * ## Do Not Mix Code Chips Between Strip Boxes Keep each code chip associated with the strip package it accompanies. Avoid: - using an old code chip automatically with a new strip box, - mixing Chosen and Advanced coding information, - using glucose coding for a ketone strip, or - assuming that a physically similar chip belongs to the current lot. The displayed code should match the applicable strip packaging. * * * ## How Much Blood Do the Compatible Strips Need? The published GK Dual system specification lists: - **Glucose testing: approximately 0.8 µL** - **β-ketone testing: approximately 1.2 µL** Do not assume the sample requirement is identical simply because both tests use the same meter. * * * ## How Fast Are the Tests? The manufacturer specifies: - **Glucose: approximately 5 seconds** - **β-ketone: approximately 10 seconds** The different timings are another indication that these are two distinct tests performed through one meter. * * * ## Can You Add a Second Blood Drop? The GK Dual instructions describe a short second-sample opportunity under specified conditions if the first sample has been applied but the countdown has not begun. For ketone testing, an additional blood drop may be applied within approximately **3 seconds** under the manufacturer-specified conditions. Do not repeatedly add blood or add more blood after the normal countdown has started. * * * ## Are the On Call Ketone Strips Individually Foil Wrapped? The current ketone strip product offered by Microsidd contains **25 individually foil-wrapped blood ketone test strips**. Individual packaging keeps each unused strip separately sealed until required. Always check the expiry and storage instructions on the actual product supplied. * * * ## Can GK Dual Use Urine Ketone Strips? No. Urine ketone strips are not inserted into the GK Dual meter. GK Dual uses specific **blood ketone test strips** to measure blood β-ketones electronically. * * * ## How to Avoid Ordering the Wrong GK Dual Strips 1. Confirm that your meter is actually **On Call GK Dual**. 2. Decide whether you need to test **glucose or ketones**. 3. For glucose, choose an explicitly compatible **Chosen or Advanced** strip. 4. For β-ketones, choose **On Call Blood Ketone Test Strips**. 5. Check the correct code chip / code information. 6. Verify expiry and storage before testing. 7. Do not substitute Plus or Extra strips merely because they carry the On Call brand. * * * ## What If the Meter Does Not Recognise the Strip? Check: - the exact meter model, - whether the strip is intended for glucose or ketone testing, - whether the glucose strip is Chosen or Advanced, - whether the ketone strip is an On Call Blood Ketone Test Strip, - correct strip insertion, - code-chip setup, - strip condition, - expiry, and - battery condition. Do not force a strip into the meter if it does not insert normally. * * * ## Shop Compatible GK Dual Ketone Strips Microsidd currently offers: [**On Call Blood Ketone Test Strips 25 →**](/products/ketone-monitor-strips) Compatible meter: [**On Call GK Dual Blood Glucose & Ketone Monitor →**](/products/ketone-monitor) Browse the broader On Call range: [**On Call Glucometers & Test Strips Collection →**](/collections/on-call-glucometer-test-strips) * * * ## Frequently Asked Questions ### Which glucose strips work with On Call GK Dual? ACON specifies **On Call Chosen or On Call Advanced Blood Glucose Test Strips** for glucose testing with GK Dual. ### Which ketone strips work with On Call GK Dual? Use **On Call Blood Ketone Test Strips**. ### Can On Call Plus strips be used in GK Dual? Do not substitute On Call Plus strips. The manufacturer currently identifies Chosen and Advanced glucose strips for GK Dual glucose testing. ### Can On Call Extra strips be used in GK Dual? Do not substitute On Call Extra strips. Use the strip systems specifically identified as compatible with GK Dual. ### Do glucose and ketone tests use the same strip? No. Glucose and ketone measurement require different test strips. ### How much blood does a glucose test need? Approximately **0.8 µL** according to the published GK Dual specification. ### How much blood does a ketone test need? Approximately **1.2 µL**. ### How long does the glucose test take? Approximately **5 seconds**. ### How long does the ketone test take? Approximately **10 seconds**. ### Does GK Dual require a code chip? Yes. Follow the code-chip procedure supplied with the applicable strip pack. ### What does an A code mean? The GK Dual manual identifies codes beginning with **A** with the On Call Advanced glucose strip system. ### What does an H code mean? Codes beginning with **H** correspond to the On Call Chosen glucose strip system according to the GK Dual manual. ### Are ketone strips the same as urine ketone strips? No. The GK Dual uses blood ketone test strips for electronic measurement of blood β-ketones. ### Are the Microsidd ketone strips individually wrapped? Yes. The current Microsidd On Call Blood Ketone Test Strips product contains 25 individually foil-wrapped strips. * * * ## Related On Call Guides - [**On Call GK Dual Glucose & Ketone Monitor Complete Guide**](/blogs/knowledge-hub/on-call-gk-dual-glucose-ketone-monitor-complete-guide) - [On Call Glucometers & Test Strips Complete Guide](/blogs/knowledge-hub/on-call-glucometers-test-strips-complete-guide) - [On Call Plus Test Strip Compatibility Guide](/blogs/knowledge-hub/on-call-plus-test-strips-compatibility-guide) - [On Call Extra Test Strip Compatibility Guide](/blogs/knowledge-hub/on-call-extra-test-strips-compatibility-guide) * * * **Compatibility notice:** Always confirm the exact meter model, test type and compatible strip family before ordering. The On Call brand includes multiple different meter-and-strip platforms and the products should not be assumed to be interchangeable. **Medical information notice:** This article explains test-strip compatibility for the On Call GK Dual system. It does not interpret an individual's glucose or ketone result, diagnose diabetes or diabetic ketoacidosis, recommend testing frequency or determine medical treatment. Use the meter and test strips according to the manufacturer's instructions and follow the testing and action plan given by your healthcare professional. Concerning glucose or ketone measurements or serious symptoms require appropriate medical assessment. **Tags:** On Call Blood Ketone strips, On Call GK Dual meter --- > Source: [Microsidd India](https://microsidd.com/blogs/knowledge-hub/on-call-gk-dual-strip-compatibility-guide)