# On Call Extra Glucometer & Test Strips Shop **On Call Extra glucometers, blood glucose test strips and individually foil-packed strips** from Microsidd India. The **On Call Extra Blood Glucose Monitoring System** from ACON is designed for use with compatible **On Call Extra Test Strips**. The standard system uses a small blood sample, provides a fast glucose result, uses automatic strip calibration and includes a short re-dosing feature when the initial blood sample is insufficient. Microsidd offers **On Call Extra glucometers, 50-strip packs, 100-strip options and individually foil-packed test strips** so customers can choose according to their meter, testing requirements, packaging preference and expected strip consumption. The most important compatibility rule is: **On Call Extra meter → On Call Extra Test Strips.** On Call Plus, On Call Extra and On Call GK Dual are different systems. Their strips should not be assumed to be interchangeable. * * * ## Shop On Call Extra Glucometers Choose the On Call Extra meter configuration that matches your existing strip supply and testing requirements. ### On Call Extra Glucometer Kit The On Call Extra Blood Glucose Monitoring System is designed for routine blood glucose testing using compatible On Call Extra Test Strips. [**Shop On Call Extra Glucometer Kit →**](/products/oncall-extra-glucometer) ### On Call Extra Glucometer Without Strips Customers who already have compatible On Call Extra Test Strips may prefer a meter configuration without additional strips. [**Shop On Call Extra Glucometer Without Strips →**](/products/oncall-extra-glucometer-without-strips) * * * ## Shop On Call Extra Test Strips Replacement strips should always be selected by the **exact meter model**, not simply by the On Call brand name. Microsidd currently offers On Call Extra strips in standard and individually foil-packed formats. ### On Call Extra Test Strips 50 The standard **50-strip pack** is a practical replacement quantity for customers who prefer a regular supply without holding a larger inventory. [**Shop On Call Extra Test Strips 50 →**](/products/oncall-extra-glucometer-strips) ### On Call Extra Test Strips 100 The **100-strip option** is suitable for customers with higher or more regular strip requirements who want to reduce repeat ordering. The current Microsidd 100-strip configuration is supplied as **50 strips × 2 packs**, allowing the second pack to remain sealed until required. [**Shop On Call Extra Test Strips 100 →**](/products/oncall-extra-glucometer-strips-100) ### On Call Extra Individually Foil-Packed Test Strips Microsidd also offers **individually foil-packed On Call Extra Test Strips**. Instead of multiple strips sharing one opened vial, each unused strip remains separately sealed until required. This format can be particularly convenient for: - travel, - occasional testing, - carrying only a few strips at a time, - users who prefer individual strip packaging, and - professional or clinical workflows where individually sealed strips are convenient. [**Shop On Call Extra Individually Foil-Packed Test Strips →**](/products/on-call-extra-glucometer-foiled-test-strips) * * * ## Which On Call Extra Test Strip Pack Should You Choose? Your Requirement Consider Main Reason Regular / moderate strip use **50 Strips** Simple standard quantity More frequent strip use **100 Strips** Larger supply and fewer repeat orders Want a reserve pack **100 Strips (50 × 2)** Second 50-strip pack can remain sealed until needed Occasional testing **50 Strips or Foil Pack** Smaller stock or individual strip packaging Travel **Foil-Packed Strips** Convenient to carry individually sealed strips Want individual strip protection **Foil-Packed Strips** Each unused strip remains separately sealed For a detailed buying comparison, read: [**On Call Extra Test Strips 50 vs 100 vs Foil Pack Guide →**](/blogs/knowledge-hub/on-call-extra-strips-50-vs-100-vs-foil-pack) * * * ## On Call Extra Test Strip Compatibility Compatibility should be checked before ordering any replacement strips. The basic rule is: **On Call Extra meter → On Call Extra Blood Glucose Test Strips.** Do not order another On Call strip family merely because: - the packaging looks similar, - the strip shape appears similar, - you previously owned another On Call meter, or - the product carries the same On Call brand name. In particular: - **On Call Plus Test Strips** are for the On Call Plus system. - **On Call Extra Test Strips** are for the On Call Extra system. - **On Call GK Dual** is a separate glucose and β-ketone monitoring platform. If you are unsure which strips you need, check the model name printed directly on your meter before ordering. Read: [**On Call Extra Test Strip Compatibility Guide →**](/blogs/knowledge-hub/on-call-extra-test-strips-compatibility-guide) * * * ## On Call Extra Key Features The standard On Call Extra blood glucose monitoring platform is designed around fast testing with a small sample requirement. Feature On Call Extra Blood sample Approximately 0.4 µL Result time Approximately 4 seconds Routine manual coding Not required on the standard system Strip calibration Automatic Re-dosing Short second-sample window when applicable Memory Up to approximately 500 results Result averages 7, 14, 30, 60 and 90 days Strip removal Built-in strip ejector on the standard meter Product specifications can vary by model generation or market. Always follow the instructions supplied with the actual meter and strips you receive. For the full system overview: [**On Call Extra Glucometer & Test Strips Complete Guide →**](/blogs/knowledge-hub/on-call-extra-glucometer-test-strips-complete-guide) * * * ## What Is On Call Extra Re-Dosing? A distinctive feature of the On Call Extra system is its **short re-dosing capability**. If the first blood application is insufficient and the meter has not begun its normal countdown, the system allows a second blood application within the manufacturer-specified short window, approximately **3 seconds**. This feature can help reduce unnecessary strip wastage when the first sample is slightly insufficient. It does **not** mean that blood can be repeatedly added to the same strip. Once the test countdown has begun, do not continue adding blood. For complete guidance: [**On Call Extra Re-Dosing & Second Blood Sample Guide →**](/blogs/knowledge-hub/on-call-extra-redosing-second-blood-sample-guide) * * * ## How to Use the On Call Extra Glucometer A typical On Call Extra blood glucose test involves: 1. Wash and thoroughly dry your hands. 2. Confirm you have a compatible On Call Extra Test Strip. 3. Insert a fresh strip correctly into the meter. 4. Wait for the sample-ready indication. 5. Prepare the lancing device with a new sterile lancet. 6. Obtain an adequate fresh blood drop. 7. Apply the sample to the strip sample tip. 8. Allow the strip to fill correctly. 9. Use the permitted re-dosing window only when required. 10. Wait approximately 4 seconds for the glucose result. 11. Remove or eject the used strip safely. For detailed instructions: [**How to Use On Call Extra Glucometer & Test Strips →**](/blogs/knowledge-hub/how-to-use-on-call-extra-glucometer-test-strips) * * * ## On Call Extra Error Codes & Troubleshooting The On Call Extra meter can display error messages relating to strip handling, sample application, battery condition, operating conditions and meter operation. Troubleshooting may involve checking: - correct test-strip compatibility, - strip insertion, - blood applied too early, - used or damaged strips, - insufficient sample, - late re-dosing, - battery condition, - temperature, and - HI or LO glucose-range displays. If an error appears, note the exact code before discarding the strip. Use the dedicated guide: [**On Call Extra Error Codes & Troubleshooting Guide →**](/blogs/knowledge-hub/on-call-extra-error-codes-troubleshooting-guide) * * * ## On Call Extra E5 & Insufficient Blood Sample The **E-5** message is particularly relevant to sample application. It can be associated with an insufficient blood sample or incorrect / late additional blood application. If the first sample is insufficient and the countdown has not started, follow the manufacturer's re-dosing procedure. Do not continue adding blood after the permitted window has passed. For E5 and other error codes: [**See On Call Extra Error Codes & Solutions →**](/blogs/knowledge-hub/on-call-extra-error-codes-troubleshooting-guide) * * * ## On Call Extra Test Strip Expiry & Storage Always check the expiry printed on the actual strip packaging supplied to you. Expiry dates change as new manufacturing batches are received. For standard vial-packed strips: - keep strips in their original manufacturer container, - remove only the strip required for the current test, - close the vial promptly, - keep the strips dry, and - follow the exact storage and after-opening instructions supplied with the pack. For individually foil-packed strips: - keep each pouch sealed until required, - do not use a pouch already damaged before opening, and - follow the printed manufacturer expiry and storage requirements. Do not automatically apply the opened-vial rules from On Call Plus or another glucose strip system to On Call Extra. Read: [**On Call Extra Test Strips Expiry & Storage Guide →**](/blogs/knowledge-hub/on-call-extra-test-strips-expiry-storage-guide) * * * ## On Call Extra vs On Call Plus On Call Extra and On Call Plus are separate glucose-monitoring platforms even though both are part of the On Call family. Feature On Call Plus On Call Extra Compatible strips On Call Plus Test Strips On Call Extra Test Strips Approx. sample size 1 µL 0.4 µL Approx. result time 10 seconds 4 seconds Coding Traditional code-chip system No routine manual coding Re-dosing Follow Plus-specific instructions Short manufacturer-supported re-dosing window For the full comparison: [**On Call Plus vs On Call Extra Glucometer Comparison →**](/blogs/knowledge-hub/on-call-plus-vs-on-call-extra-glucometer) If your meter is actually On Call Plus, visit: [**On Call Plus Glucometer & Test Strips Collection →**](/collections/on-call-plus-glucometer-strips) * * * ## On Call Extra Knowledge Hub Microsidd's On Call Extra Knowledge Hub provides detailed information for customers who want to understand compatibility, testing, re-dosing, troubleshooting and strip storage before or after purchase. - [**On Call Extra Glucometer & Test Strips Complete Guide**](/blogs/knowledge-hub/on-call-extra-glucometer-test-strips-complete-guide) - [On Call Extra Test Strip Compatibility Guide](/blogs/knowledge-hub/on-call-extra-test-strips-compatibility-guide) - [How to Use On Call Extra Glucometer & Test Strips](/blogs/knowledge-hub/how-to-use-on-call-extra-glucometer-test-strips) - [On Call Extra Re-Dosing & Second Blood Sample Guide](/blogs/knowledge-hub/on-call-extra-redosing-second-blood-sample-guide) - [On Call Extra Error Codes & Troubleshooting Guide](/blogs/knowledge-hub/on-call-extra-error-codes-troubleshooting-guide) - [On Call Extra Test Strips Expiry & Storage Guide](/blogs/knowledge-hub/on-call-extra-test-strips-expiry-storage-guide) - [On Call Extra Test Strips 50 vs 100 vs Foil Pack](/blogs/knowledge-hub/on-call-extra-strips-50-vs-100-vs-foil-pack) - [On Call Plus vs On Call Extra Glucometer Comparison](/blogs/knowledge-hub/on-call-plus-vs-on-call-extra-glucometer) For the wider On Call family: [**On Call Glucometers & Test Strips Complete Guide →**](/blogs/knowledge-hub/on-call-glucometers-test-strips-complete-guide) You can also browse: [**On Call Glucometers & Test Strips Collection →**](/collections/on-call-glucometer-test-strips) * * * ## Frequently Asked Questions ### Which test strips work with the On Call Extra glucometer? Use compatible **On Call Extra Blood Glucose Test Strips**. Always verify the exact meter model and strip packaging before ordering. ### Can On Call Plus strips be used in On Call Extra? No. On Call Plus and On Call Extra use different compatible strip systems. ### Do On Call Extra 50 and 100 strips work with the same meter? Yes, where both products are genuine On Call Extra Test Strips intended for the compatible On Call Extra system. ### How is the 100-strip option supplied? Microsidd's current On Call Extra 100-strip option is supplied as **50 strips × 2 packs**. ### Are individually foil-packed On Call Extra strips compatible? Yes, where the product is specifically identified as compatible with the On Call Extra Blood Glucose Monitoring System. ### What is the advantage of foil-packed strips? Each unused strip remains individually sealed until needed, which can be convenient for travel, occasional testing and customers who prefer individual packaging. ### How much blood does On Call Extra require? The standard On Call Extra system uses approximately **0.4 µL of fresh capillary whole blood**. ### How fast is the On Call Extra result? The standard meter typically displays a glucose result in approximately **4 seconds** after an adequate sample is accepted. ### Does On Call Extra need a code chip? The standard On Call Extra system uses automatic strip calibration and does not require the routine manual code-chip process used by traditional On Call Plus systems. ### Can I add a second blood drop? Under the manufacturer's specified conditions, On Call Extra supports a short re-dosing window when the first sample is insufficient and the countdown has not started. ### What does E5 mean on On Call Extra? E-5 can be associated with insufficient sample or incorrect / late additional blood application. Follow the model-specific troubleshooting instructions. ### Which pack is suitable for frequent strip use? The 100-strip option may be convenient for higher strip consumption, provided the quantity can be stored correctly and used within the applicable expiry. ### Which pack is convenient for travel? Individually foil-packed strips can be particularly convenient because only a small number of sealed strips need to be carried. ### Where can I buy On Call Extra glucometers and strips in Bengaluru? Microsidd India supplies On Call Extra glucometers and compatible test strips from RT Nagar, Bengaluru, with online ordering and delivery across India. * * * ## Why Buy On Call Extra from Microsidd India? Microsidd India supplies genuine On Call / ACON blood glucose monitoring products to individual customers, healthcare professionals, clinics and other buyers across India. - Authorised On Call / ACON supply - On Call Extra glucometer options - 50-strip standard packs - 100-strip option supplied as 50 × 2 - Individually foil-packed Extra strips - Compatibility-focused product information - Detailed usage and troubleshooting guides - Competitive online pricing - Fast dispatch and delivery across India - GST invoice available where applicable Customers in Bengaluru can also visit: [**Microsidd India – RT Nagar, Bengaluru →**](/pages/microsidd-india-bangalore) * * * **Compatibility notice:** Please verify the **meter model, strip compatibility, pack quantity and product specifications** before ordering. On Call Plus, On Call Extra and On Call GK Dual are separate systems and their test strips should not be assumed to be interchangeable. **Medical information notice:** The information on this collection page is provided to help customers identify and compare On Call Extra products. It does not diagnose diabetes, recommend a testing frequency, interpret an individual's glucose result or replace the manufacturer's instructions or professional medical advice. ## Products in this collection - [On Call Extra Blood Glucose Test Strips 50's Pack Genuine ACON Test Strips for On Call Extra Glucometer](https://microsidd.com/products/oncall-extra-glucometer-strips) - 549.0 INR - [On Call Extra Blood Glucose Test Strips](https://microsidd.com/products/on-call-extra-blood-glucose-test-strips) - 549.0 INR - [On Call Extra Blood Glucose Monitoring System (Glucometer Kit) | Blood Sugar Test Machine with Meter, Lancing Device, 10 Lancets, Carry Case & User Manual | Fast & Accurate Blood Glucose Monitoring for Home Use](https://microsidd.com/products/oncall-extra-glucometer) - 599.0 INR - [Oncall Extra Glucometer Strips 100](https://microsidd.com/products/oncall-extra-glucometer-strips-100) - 1099.0 INR - [On Call Extra Glucometer Foiled Test Strips](https://microsidd.com/products/on-call-extra-glucometer-foiled-test-strips) - 599.0 INR - [Oncall Extra Glucometer without Strips](https://microsidd.com/products/oncall-extra-glucometer-without-strips) - 499.0 INR --- > Source: [Microsidd India](https://microsidd.com/collections/on-call-extra-glucometer-strips) > Updated: 2026-10-21