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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2020-03-16 </periodOfReport> |
| <notSubjectToSection16> 0 </notSubjectToSection16> |
| <issuer> |
| | <issuerCik> 0000720154 </issuerCik> |
| | <issuerName> BIOANALYTICAL SYSTEMS INC </issuerName> |
| | <issuerTradingSymbol> BASI </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001762245 </rptOwnerCik> |
| | | <rptOwnerName> Leasure Robert Jr. </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O BIOANALYTICAL SYSTEMS, INC. </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 2701 KENT AVENUE </rptOwnerStreet2> |
| | | <rptOwnerCity> WEST LAFAYETTE </rptOwnerCity> |
| | | <rptOwnerState> IN </rptOwnerState> |
| | | <rptOwnerZipCode> 47906-1382 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | <isOfficer> 1 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle> President and CEO </officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeTransaction> |
| | | <securityTitle> |
| <value> Common Shares </value> |
| </securityTitle> |
| | | <transactionDate> |
| <value> 2020-03-16 </value> |
| </transactionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> P </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 5700 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 3.49 </value> |
| <footnoteId id="F1"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 183665 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeTransaction> |
| | </nonDerivativeTable> |
| <derivativeTable></derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.47 to $3.49, inclusive. The reporting person undertakes to provide to Bioanalytical Systems, Inc., any security holder of Bioanalytical Systems, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. </footnote> |
| | </footnotes> |
| <remarks> Exhibit List: Exhibit 24.1 -- Power of Attorney </remarks> |
| <ownerSignature> |
| | <signatureName> /s/ Beth Taylor, attorney-in-fact for Robert Leasure, Jr. </signatureName> |
| | <signatureDate> 2020-03-17 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |