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  1. Home
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  3. Weights & Masses
  4. Reference Weights & Mass Standards

Reference Weights & Mass Standards

Ensure precise calibration with reliable reference weights and mass standards built to ASTM and OIML specifications. Ideal for analytical and precision balances, these certified weights are available individually or in sets, in various classes and materials. Contact us at 888-4-LABPRO (888-452-2776) for competitive bulk pricing, with next-day service in California and same-day service for will-calls.
  • Featured
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  • Weight Set ASTM (2)200g-1g UC No Cert TR - 30390009

    $1,789.00

    Weight Set ASTM (2)200g-1g UC No Cert TR - 30390009

  • Weight Set ASTM (2)200g-1g UC NonAcrd TR - 30390013

    $2,167.00

    Weight Set ASTM (2)200g-1g UC NonAcrd TR - 30390013

  • Weight Set ASTM (2)2kg-1mg UC No Cert TR - 30390010

    $8,270.00

    Weight Set ASTM (2)2kg-1mg UC No Cert TR - 30390010

  • Weight Set ASTM (2)2kg-1mg UC Accrd TR - 30390018

    $11,213.00

    Weight Set ASTM (2)2kg-1mg UC Accrd TR - 30390018

  • Weight Set ASTM (2)2kg-1g UC NonAcrd TR - 30390015

    $8,742.00

    Weight Set ASTM (2)2kg-1g UC NonAcrd TR - 30390015

  • Weight Set ASTM (2)200g-1mg UC NoCert TR - 30390008

    $2,532.00

    Weight Set ASTM (2)200g-1mg UC NoCert TR - 30390008

  • Weight Set ASTM (2)2kg-1mg UC NonAcrd TR - 30390014

    $10,187.00

    Weight Set ASTM (2)2kg-1mg UC NonAcrd TR - 30390014

  • Weight Set ASTM (2)200g-1mg UC Accrd TR - 30390016

    $4,949.00

    Weight Set ASTM (2)200g-1mg UC Accrd TR - 30390016

  • Weight Set ASTM (2)2kg-1g UC No Cert TR - 30390011

    $7,532.00

    Weight Set ASTM (2)2kg-1g UC No Cert TR - 30390011

  • Weight Set ASTM (2)200g-1g UC Accrd TR - 30390017

    $2,774.00

    Weight Set ASTM (2)200g-1g UC Accrd TR - 30390017

  • Weight Set ASTM (2)200g-1mg UC NonAd TR - 30390012

    $3,652.00

    Weight Set ASTM (2)200g-1mg UC NonAd TR - 30390012

  • Weight Set ASTM 50g-1g UC Accrd TR - 30390146

    $2,106.00

    Weight Set ASTM 50g-1g UC Accrd TR - 30390146

  • Weight Set ASTM 20g-1mg UC Accrd TR - 30390137

    $3,456.00

    Weight Set ASTM 20g-1mg UC Accrd TR - 30390137

  • Weight Set ASTM (2)2kg-1g UC Accrd TR - 30390019

    $9,322.00

    Weight Set ASTM (2)2kg-1g UC Accrd TR - 30390019

  • Weight Set ASTM 20g-10mg UC Accrd TR - 30390139

    $2,890.00

    Weight Set ASTM 20g-10mg UC Accrd TR - 30390139

  • Weight Set ASTM 20g-1g UC Accrd TR - 30390141

    $1,641.00

    Weight Set ASTM 20g-1g UC Accrd TR - 30390141

  • Weight Set ASTM 20g-5mg UC Accrd TR - 30390138

    $3,005.00

    Weight Set ASTM 20g-5mg UC Accrd TR - 30390138

  • Weight Set ASTM 500mg-1mg UC Accrd TR - 30390135

    $2,276.00

    Weight Set ASTM 500mg-1mg UC Accrd TR - 30390135

  • Weight Set ASTM 50kg-1g UC Non-Accrd TR - 30390134

    $42,844.00

    Weight Set ASTM 50kg-1g UC Non-Accrd TR - 30390134

  • Weight Set ASTM 50g-100mg UC Accrd TR - 30390145

    $2,682.00

    Weight Set ASTM 50g-100mg UC Accrd TR - 30390145

  • Weight Set ASTM 500mg-10mg UC Accrd TR - 30390136

    $1,831.00

    Weight Set ASTM 500mg-10mg UC Accrd TR - 30390136

  • Weight Set ASTM 50g-10mg UC Accrd TR - 30390144

    $3,328.00

    Weight Set ASTM 50g-10mg UC Accrd TR - 30390144

  • Weight Set ASTM 50g-5mg UC Accrd TR - 30390143

    $3,233.00

    Weight Set ASTM 50g-5mg UC Accrd TR - 30390143

  • Weight Set ASTM 20g-100mg UC Accrd TR - 30390140

    $2,403.00

    Weight Set ASTM 20g-100mg UC Accrd TR - 30390140

  • Weight Set ASTM 50g-1mg UC Accrd TR - 30390142

    $3,863.00

    Weight Set ASTM 50g-1mg UC Accrd TR - 30390142

  • Weight Set ASTM 10kg-1mg UC Accrd TR - 30390162

    $16,929.00

    Weight Set ASTM 10kg-1mg UC Accrd TR - 30390162

  • Weight Set ASTM 500g-1g UC Accrd TR - 30390155

    $4,469.00

    Weight Set ASTM 500g-1g UC Accrd TR - 30390155

  • Weight Set ASTM 200g-1g UC Accrd TR - 30390153

    $2,512.00

    Weight Set ASTM 200g-1g UC Accrd TR - 30390153

  • Weight Set ASTM 100g-1g UC Accrd TR - 30390151

    $2,195.00

    Weight Set ASTM 100g-1g UC Accrd TR - 30390151

  • Weight Set ASTM 5kg-1mg UC Accrd TR - 30390160

    $13,184.00

    Weight Set ASTM 5kg-1mg UC Accrd TR - 30390160

  • Weight Set ASTM 100g-10mg UC Accrd TR - 30390149

    $3,519.00

    Weight Set ASTM 100g-10mg UC Accrd TR - 30390149

  • Weight Set ASTM 100g-5mg UC Accrd TR - 30390148

    $3,328.00

    Weight Set ASTM 100g-5mg UC Accrd TR - 30390148

  • Weight Set ASTM 100g-1mg UC Accrd TR - 30390147

    $4,051.00

    Weight Set ASTM 100g-1mg UC Accrd TR - 30390147

  • Weight Set ASTM 200g-1mg UC Accrd TR - 30390152

    $4,415.00

    Weight Set ASTM 200g-1mg UC Accrd TR - 30390152

  • Weight Set ASTM 20kg-1g UC Accrd TR - 30390165

    $20,318.00

    Weight Set ASTM 20kg-1g UC Accrd TR - 30390165

  • Weight Set ASTM 20g-1mg UC No Cert TR - 30390063

    $2,209.00

    Weight Set ASTM 20g-1mg UC No Cert TR - 30390063

  • Weight Set ASTM 2kg-1g UC Accrd TR - 30390159

    $7,446.00

    Weight Set ASTM 2kg-1g UC Accrd TR - 30390159

  • Weight Set ASTM 1kg-1g UC Accrd TR - 30390157

    $6,036.00

    Weight Set ASTM 1kg-1g UC Accrd TR - 30390157

  • Weight Set ASTM 100g-100mg UC Accrd TR - 30390150

    $2,864.00

    Weight Set ASTM 100g-100mg UC Accrd TR - 30390150

  • Weight Set ASTM 20g-10mg UC No Cert TR - 30390065

    $1,794.00

    Weight Set ASTM 20g-10mg UC No Cert TR - 30390065

  • Weight Set ASTM 20kg-1mg UC Accrd TR - 30390164

    $22,206.00

    Weight Set ASTM 20kg-1mg UC Accrd TR - 30390164

  • Weight Set ASTM 20g-5mg UC No Cert TR - 30390064

    $1,926.00

    Weight Set ASTM 20g-5mg UC No Cert TR - 30390064

  • Weight 1P ASTM 30mg UC No Cert TR - 30390178

    $138.00

    Weight 1P ASTM 30mg UC No Cert TR - 30390178

  • Weight Set ASTM 500g-1mg UC Accrd TR - 30390154

    $6,372.00

    Weight Set ASTM 500g-1mg UC Accrd TR - 30390154

  • Weight Set ASTM 25kg-1g UC Accrd TR - 30390167

    $28,430.00

    Weight Set ASTM 25kg-1g UC Accrd TR - 30390167

  • Weight Set ASTM 500mg-1mg UC No Cert TR - 30390061

    $1,318.00

    Weight Set ASTM 500mg-1mg UC No Cert TR - 30390061

  • Weight Set ASTM 50g-10mg UC No Cert TR - 30390070

    $1,898.00

    Weight Set ASTM 50g-10mg UC No Cert TR - 30390070

  • Weight Set ASTM 1kg-1mg UC No Cert TR - 30390082

    $5,717.00

    Weight Set ASTM 1kg-1mg UC No Cert TR - 30390082

  • Weight Set ASTM 2kg-1mg UC Accrd TR - 30390158

    $9,302.00

    Weight Set ASTM 2kg-1mg UC Accrd TR - 30390158

  • Weight Set ASTM 5kg-1g UC Accrd TR - 30390161

    $11,584.00

    Weight Set ASTM 5kg-1g UC Accrd TR - 30390161

  • Weight Set ASTM 500mg-10mg UC No Cert TR - 30390062

    $887.00

    Weight Set ASTM 500mg-10mg UC No Cert TR - 30390062

  • Weight Set ASTM 30kg-1mg UC Accrd TR - 30390168

    $30,701.00

    Weight Set ASTM 30kg-1mg UC Accrd TR - 30390168

  • Weight Set ASTM 50g-100mg UC No Cert TR - 30390071

    $1,600.00

    Weight Set ASTM 50g-100mg UC No Cert TR - 30390071

  • Weight Set ASTM 50g-1mg UC No Cert TR - 30390068

    $2,282.00

    Weight Set ASTM 50g-1mg UC No Cert TR - 30390068

  • Weight Set ASTM 50g-5mg UC No Cert TR - 30390069

    $2,007.00

    Weight Set ASTM 50g-5mg UC No Cert TR - 30390069

  • Weight Set ASTM 50kg-1mg UC Accrd TR - 30390170

    $45,141.00

    Weight Set ASTM 50kg-1mg UC Accrd TR - 30390170

  • Weight 1P ASTM 100mg UC No Cert TR - 30390180

    $138.00

    Weight 1P ASTM 100mg UC No Cert TR - 30390180

  • Weight Set ASTM 100g-10mg UC No Cert TR - 30390075

    $1,997.00

    Weight Set ASTM 100g-10mg UC No Cert TR - 30390075

  • Weight 1P ASTM 20mg UC No Cert TR - 30390177

    $138.00

    Weight 1P ASTM 20mg UC No Cert TR - 30390177

  • Weight Set ASTM 25kg-1mg UC Accrd TR - 30390166

    $30,048.00

    Weight Set ASTM 25kg-1mg UC Accrd TR - 30390166

  • Weight Set ASTM 20g-1g UC No Cert TR - 30390067

    $1,230.00

    Weight Set ASTM 20g-1g UC No Cert TR - 30390067

  • Weight 1P ASTM 200mg UC No Cert TR - 30390181

    $138.00

    Weight 1P ASTM 200mg UC No Cert TR - 30390181

  • Weight Set ASTM 10kg-1g UC Accrd TR - 30390163

    $15,145.00

    Weight Set ASTM 10kg-1g UC Accrd TR - 30390163

  • Weight Set ASTM 100g-1g UC No Cert TR - 30390077

    $1,358.00

    Weight Set ASTM 100g-1g UC No Cert TR - 30390077

  • Weight Set ASTM 30kg-1g UC Accrd TR - 30390169

    $28,919.00

    Weight Set ASTM 30kg-1g UC Accrd TR - 30390169

  • Weight Set ASTM 10kg-1mg UC No Cert TR - 30390088

    $14,592.00

    Weight Set ASTM 10kg-1mg UC No Cert TR - 30390088

  • Weight 1P ASTM 3mg UC No Cert TR - 30390174

    $138.00

    Weight 1P ASTM 3mg UC No Cert TR - 30390174

  • Weight 2P ASTM 20g UC No Cert TR - 30390189

    $156.00

    Weight 2P ASTM 20g UC No Cert TR - 30390189

  • Weight 1P ASTM 500mg UC No Cert TR - 30390183

    $138.00

    Weight 1P ASTM 500mg UC No Cert TR - 30390183

  • Weight Set ASTM 5kg-1mg UC No Cert TR - 30390086

    $10,443.00

    Weight Set ASTM 5kg-1mg UC No Cert TR - 30390086

  • Weight Set ASTM 1kg-1mg UC Accrd TR - 30390156

    $7,898.00

    Weight Set ASTM 1kg-1mg UC Accrd TR - 30390156

  • Weight 2P ASTM 50g UC No Cert TR - 30390191

    $174.00

    Weight 2P ASTM 50g UC No Cert TR - 30390191

  • Weight 2P ASTM 500g UC No Cert TR - 30390195

    $436.00

    Weight 2P ASTM 500g UC No Cert TR - 30390195

  • Weight Set ASTM 500g-1mg UC No Cert TR - 30390080

    $4,130.00

    Weight Set ASTM 500g-1mg UC No Cert TR - 30390080

  • Weight 1P ASTM 2mg UC No Cert TR - 30390173

    $138.00

    Weight 1P ASTM 2mg UC No Cert TR - 30390173

  • Weight 1P ASTM 5mg UC No Cert TR - 30390175

    $138.00

    Weight 1P ASTM 5mg UC No Cert TR - 30390175

  • Weight Set ASTM 50g-1g UC No Cert TR - 30390072

    $1,451.00

    Weight Set ASTM 50g-1g UC No Cert TR - 30390072

  • Weight 2P ASTM 3g UC No Cert TR - 30390186

    $156.00

    Weight 2P ASTM 3g UC No Cert TR - 30390186

  • Weight 1P ASTM 1mg UC No Cert TR - 30390172

    $138.00

    Weight 1P ASTM 1mg UC No Cert TR - 30390172

  • Weight Set ASTM 100g-1mg UC No Cert TR - 30390073

    $2,162.00

    Weight Set ASTM 100g-1mg UC No Cert TR - 30390073

  • Weight Set ASTM 10kg-1g UC No Cert TR - 30390089

    $13,864.00

    Weight Set ASTM 10kg-1g UC No Cert TR - 30390089

  • Weight Set ASTM 50kg-1mg UC No Cert TR - 30390096

    $40,552.00

    Weight Set ASTM 50kg-1mg UC No Cert TR - 30390096

  • Weight Set ASTM 2kg-1g UC No Cert TR - 30390085

    $6,326.00

    Weight Set ASTM 2kg-1g UC No Cert TR - 30390085

  • Weight Set ASTM 25kg-1g UC No Cert TR - 30390093

    $27,335.00

    Weight Set ASTM 25kg-1g UC No Cert TR - 30390093

  • Weight Set ASTM 20kg-1mg UC No Cert TR - 30390090

    $18,210.00

    Weight Set ASTM 20kg-1mg UC No Cert TR - 30390090

  • Weight 1P ASTM 300mg UC No Cert TR - 30390182

    $138.00

    Weight 1P ASTM 300mg UC No Cert TR - 30390182

  • Weight Set ASTM 50g-5mg UC Non-Accrd TR - 30390106

    $2,687.00

    Weight Set ASTM 50g-5mg UC Non-Accrd TR - 30390106

  • Weight Set ASTM 200g-1g UC No Cert TR - 30390079

    $1,628.00

    Weight Set ASTM 200g-1g UC No Cert TR - 30390079

  • Weight 1P ASTM 300g UC No Cert TR - 30390194

    $320.00

    Weight 1P ASTM 300g UC No Cert TR - 30390194

  • Weight Set ASTM 2kg-1mg UC No Cert TR - 30390084

    $7,297.00

    Weight Set ASTM 2kg-1mg UC No Cert TR - 30390084

  • Weight 1P ASTM 10mg UC No Cert TR - 30390176

    $138.00

    Weight 1P ASTM 10mg UC No Cert TR - 30390176

  • Weight 2P ASTM 2g UC No Cert TR - 30390185

    $141.00

    Weight 2P ASTM 2g UC No Cert TR - 30390185

  • Weight 2P ASTM 10g UC No Cert TR - 30390188

    $156.00

    Weight 2P ASTM 10g UC No Cert TR - 30390188

  • Weight Set ASTM 50kg-1g UC Accrd TR - 30390171

    $43,604.00

    Weight Set ASTM 50kg-1g UC Accrd TR - 30390171

  • Weight Set ASTM 30kg-1mg UC No Cert TR - 30390094

    $27,076.00

    Weight Set ASTM 30kg-1mg UC No Cert TR - 30390094

  • Weight Set ASTM 100g-100mg UC No Cert TR - 30390076

    $1,655.00

    Weight Set ASTM 100g-100mg UC No Cert TR - 30390076

  • Weight 2P ASTM 1kg UC Accrd TR - 30390261

    $1,139.00

    Weight 2P ASTM 1kg UC Accrd TR - 30390261

  • Weight 2P ASTM 3kg UC No Cert TR - 30390198

    $1,810.00

    Weight 2P ASTM 3kg UC No Cert TR - 30390198

  • Weight 2P ASTM 2kg UC Accrd TR - 30390262

    $1,648.00

    Weight 2P ASTM 2kg UC Accrd TR - 30390262

  • Weight 2P ASTM 25kg UC No Cert TR - 30390202

    $8,323.00

    Weight 2P ASTM 25kg UC No Cert TR - 30390202