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T500-4 is the rechargeable lithium replacement battery identified by Apera for TN500 and TN420 turbidity meters. Select the exact replacement rather than substituting a battery based only on its appearance.
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APERA INSTRUMENTS / T500-4 / AI4208
Compare the selected product with the related listings below. Check the application, connection and order contents before choosing.
Linked cards open current store listings. Other cards compare configurations; they do not imply current storefront availability.
Apera identifies this rechargeable lithium battery for TN500 and TN420. The replacement is model-specific; do not choose solely by cell shape, lead colors or a connector that seems to fit.
Older catalogs use TN500-S naming; Apera’s current accessory page identifies this model as T500-4. The manufacturer AI part number remains AI4208.
Power down and disconnect the charger before battery replacement. Follow the meter instructions for access, connector orientation and reassembly. Use the specified charging equipment.
The accessory page does not provide additional capacity or voltage specifications. Use the exact replacement model rather than assuming generic specifications.
Match the stated limits and configuration to your procedure. The Product Specifications tab repeats the order details for quick reference.
Apera TN500 Portable White-Light Turbidity Meter with Data Logging
Apera TN420 Portable White-Light Turbidity Meter
Apera identifies T500-4 for TN500 and TN420 turbidity meters.
AI4208; the older workbook name is TN500-S4.
No. This is a replacement accessory for an existing compatible instrument.
Use the specified part. Appearance alone does not establish electrical, mechanical or optical compatibility.
Power down the meter, disconnect external power and follow the host manual’s replacement procedure.
No universal compatibility is claimed. Confirm TN500 or TN420 and the correct replacement model.
No charger is included in this battery listing.
Follow the host manual’s startup checks and any calibration or functional checks required before taking reportable measurements.
Review the order contents and the required host meter and application before ordering. Contact Blue Tiger Scientific if you need help matching the part.
Manufacturer warranty support is subject to Apera’s terms for the specific product and the cause of the issue. Keep your purchase record and product identification for a support request.
For setup, compatibility or troubleshooting support, contact Blue Tiger Scientific with the model, order number and a description of the issue.
Contact Blue Tiger Scientific before returning a product. Return eligibility and instructions depend on the store’s applicable return policy and the condition of the item.
Document scope is shown on each card. A parent-meter manual or family handbook may describe other configurations and does not change the order contents on this page.
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