EnviroDive Diving, Training and Nitrox Gas Blending Gear
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Helium Blending Tables

Enviro Dive Services
Helium Mixing Tables for 3000 psi cylinders
(HeliAir, HeliTrox and TriMix)

These tables are Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.

Please click on a link below to jump directly to your required table
Helium & 21% (Air)- 3000 PSI Cylinders
Helium & 22% EANx - 3000 PSI Cylinders
Helium & 23% EANx - 3000 PSI Cylinders
Helium & 24% EANx - 3000 PSI Cylinders
Helium & 25% EANx - 3000 PSI Cylinders
Helium & 26% EANx - 3000 PSI Cylinders
Helium & 27% EANx - 3000 PSI Cylinders
Helium & 28% EANx - 3000 PSI Cylinders
Helium & 29% EANx - 3000 PSI Cylinders
Helium & 30% EANx - 3000 PSI Cylinders
Helium & 31% EANx - 3000 PSI Cylinders
Helium & 32% EANx - 3000 PSI Cylinders
Helium & 33% EANx - 3000 PSI Cylinders
Helium & 34% EANx - 3000 PSI Cylinders
Helium & 35% EANx - 3000 PSI Cylinders
Helium & 36% EANx - 3000 PSI Cylinders

Helium & 21% (Air) - 3000 PSI Cylinders

    Helium & 21% (Air) 3000 psi cylinder              
    psi psi psi psi psi psi psi psi psi psi psi psi
Start with Helium 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800
Top with Air 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200
                           
    % % % % % % % % % % % %
Helium 0.233 0.267 0.300 0.333 0.367 0.400 0.433 0.467 0.500 0.533 0.567 0.600
Oxygen 0.161 0.154 0.147 0.140 0.133 0.126 0.119 0.112 0.105 0.098 0.091 0.084
Nitrogen 0.606 0.579 0.553 0.527 0.500 0.474 0.448 0.421 0.395 0.369 0.342 0.316
                           
END PO2 fsw fsw fsw fsw fsw fsw fsw fsw fsw fsw fsw fsw
109 0.9 151 160 169 179 190 203 217 232 250 270 293 321
125 1.0 172 181 191 203 215 229 244 262 281 304 330 360
140 1.1 192 203 214 226 240 255 272 291 313 337 366 399
156 1.2 213 224 236 250 265 281 300 321 344 371 402 438
                           
Hypoxic above 4.00 6.00 8.00 10.00 12.00 15.00 17.00 21.00 24.00 28.00 33.00 38.00


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Helium & 22% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 22% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 22 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.147 0.139 0.132 0.125 0.117 0.110
Nitrogen 0.520 0.494 0.468 0.442 0.416 0.390
               
END PO2 fsw fsw fsw fsw fsw fsw
101 0.9 170 180 192 205 220 237
116 1.0 192 204 217 232 248 267
130 1.1 215 228 242 258 276 297
145 1.2 237 251 267 285 305 327
               
Hypoxic above 8.00 10.00 12.00 15.00 18.00 21.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 25 24 23 22 20 19
Top with Air 1975 1876 1777 1678 1580 1481


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Helium & 23% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 23% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 23 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.153 0.146 0.138 0.130 0.123 0.115
Nitrogen 0.513 0.488 0.462 0.436 0.411 0.385
               
END PO2 fsw fsw fsw fsw fsw fsw
93 0.9 161 171 182 195 209 225
107 1.0 182 194 206 220 236 254
121 1.1 204 216 230 246 263 283
135 1.2 225 239 254 271 290 311
               
Hypoxic above 6.00 8.00 11.00 13.00 16.00 19.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 51 48 46 43 41 38
Top with Air 1949 1852 1754 1657 1559 1462


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Helium & 24% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 24% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 24 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.160 0.152 0.144 0.136 0.128 0.120
Nitrogen 0.507 0.481 0.456 0.431 0.405 0.380
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.0 173 184 196 210 225 242
113 1.1 194 206 219 234 251 270
126 1.2 215 228 242 258 276 297
139 1.3 235 249 265 282 302 325
               
Hypoxic above 5.00 7.00 9.00 11.00 14.00 17.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 76 72 68 65 61 57
Top with Air 1924 1828 1732 1635 1539 1443


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Helium & 25% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 25% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 25 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.167 0.158 0.150 0.142 0.133 0.125
Nitrogen 0.500 0.475 0.450 0.425 0.400 0.375
               
END PO2 fsw fsw fsw fsw fsw fsw
93 1.0 165 175 187 200 215 231
105 1.1 185 196 209 223 239 257
118 1.2 205 217 231 247 264 284
130 1.3 224 238 253 270 289 310
               
Hypoxic above 3.00 5.00 7.00 9.00 12.00 15.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 101 96 91 86 81 76
Top with Air 1899 1804 1709 1614 1519 1424


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Helium & 26% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 26% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 26 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.173 0.165 0.156 0.147 0.139 0.130
Nitrogen 0.493 0.469 0.444 0.419 0.395 0.370
               
END PO2 fsw fsw fsw fsw fsw fsw
98 1.1 176 187 200 213 229 246
110 1.2 195 207 221 236 253 272
122 1.3 215 228 242 258 276 297
134 1.4 234 248 263 281 300 322
               
Hypoxic above 2.00 4.00 6.00 8.00 10.00 13.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 127 120 114 108 101 95
Top with Air 1873 1780 1686 1592 1499 1405


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Helium & 27% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 27% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 27 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.180 0.171 0.162 0.153 0.144 0.135
Nitrogen 0.487 0.462 0.438 0.414 0.389 0.365
               
END PO2 fsw fsw fsw fsw fsw fsw
103 1.2 187 199 211 226 242 260
114 1.3 205 218 232 247 265 285
126 1.4 224 237 252 269 288 309
137 1.5 242 256 273 291 311 334
               
Hypoxic above   2.00 4.00 6.00 9.00 11.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 152 144 137 129 122 114
Top with Air 1848 1756 1663 1571 1478 1386


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Helium & 28% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 28% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 28 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.187 0.177 0.168 0.159 0.149 0.140
Nitrogen 0.480 0.456 0.432 0.408 0.384 0.360
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.3 197 209 222 237 254 273
118 1.4 215 228 242 258 276 297
129 1.5 232 246 262 279 298 321
139 1.6 250 265 281 300 321 344
               
Hypoxic above   1.00 3.00 5.00 7.00 10.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 177 168 159 151 142 133
Top with Air 1823 1732 1641 1549 1458 1367


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Helium & 29% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 29% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 29 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.193 0.184 0.174 0.164 0.155 0.145
Nitrogen 0.473 0.450 0.426 0.402 0.379 0.355
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.3 189 201 214 228 244 263
111 1.4 206 219 233 248 266 286
121 1.5 223 237 251 268 287 308
131 1.6 240 254 270 288 308 331
               
Hypoxic above     2.00 4.00 6.00 8.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 203 192 182 172 162 152
Top with Air 1797 1708 1618 1528 1438 1348


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Helium & 30% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 30% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 30 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.200 0.190 0.180 0.170 0.160 0.150
Nitrogen 0.467 0.443 0.420 0.397 0.373 0.350
               
END PO2 fsw fsw fsw fsw fsw fsw
94 1.3 182 193 205 219 235 253
104 1.4 198 210 224 239 256 275
114 1.5 215 228 242 258 276 297
123 1.6 231 245 260 278 297 319
               
Hypoxic above       2.00 5.00 7.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 228 216 205 194 182 171
Top with Air 1772 1684 1595 1506 1418 1329


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Helium & 31% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 31% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 31 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.207 0.196 0.186 0.176 0.165 0.155
Nitrogen 0.460 0.437 0.414 0.391 0.368 0.345
               
END PO2 fsw fsw fsw fsw fsw fsw
88 1.3 175 186 198 211 226 244
98 1.4 191 202 215 230 246 265
107 1.5 207 219 233 249 266 286
116 1.6 222 236 251 268 286 308
               
Hypoxic above       1.00 3.00 6.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 253 241 228 215 203 190
Top with Air 1747 1659 1572 1485 1397 1310


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Helium & 32% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 32% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 32 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.213 0.203 0.192 0.181 0.171 0.160
Nitrogen 0.453 0.431 0.408 0.385 0.363 0.340
               
END PO2 fsw fsw fsw fsw fsw fsw
83 1.3 168 179 190 204 218 235
92 1.4 184 195 208 222 238 256
101 1.5 199 211 225 240 257 276
110 1.6 215 228 242 258 276 297
               
Hypoxic above         2.00 5.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 278 265 251 237 223 209
Top with Air 1722 1635 1549 1463 1377 1291


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Helium & 33% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 33% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 33 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.220 0.209 0.198 0.187 0.176 0.165
Nitrogen 0.447 0.424 0.402 0.380 0.357 0.335
               
END PO2 fsw fsw fsw fsw fsw fsw
78 1.3 162 172 184 196 211 227
86 1.4 177 188 200 214 230 247
95 1.5 192 204 217 232 248 267
103 1.6 207 220 234 249 267 287
               
Hypoxic above         1.00 3.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 304 289 273 258 243 228
Top with Air 1696 1611 1527 1442 1357 1272


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Helium & 34% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 34% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 34 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.227 0.215 0.204 0.193 0.181 0.170
Nitrogen 0.440 0.418 0.396 0.374 0.352 0.330
               
END PO2 fsw fsw fsw fsw fsw fsw
73 1.3 156 166 177 190 204 219
81 1.4 171 182 193 207 222 239
89 1.5 185 197 210 224 240 258
97 1.6 200 212 226 241 258 278
               
Hypoxic above           2.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 329 313 296 280 263 247
Air 1671 1587 1504 1420 1337 1253


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Helium & 35% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 35% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 35 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.233 0.222 0.210 0.198 0.187 0.175
Nitrogen 0.433 0.412 0.390 0.368 0.347 0.325
               
END PO2 fsw fsw fsw fsw fsw fsw
68 1.3 151 161 171 183 197 212
76 1.4 165 175 187 200 215 231
84 1.5 179 190 203 217 232 250
92 1.6 193 205 218 233 250 269
               
Hypoxic above           1.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 354 337 319 301 284 266
Air 1646 1563 1481 1399 1316 1234


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Helium & 36% EANx - 3000 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 36% EANx 3000 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 36 2000 1900 1800 1700 1600 1500
               
    % % % % % %
Helium 0.333 0.367 0.400 0.433 0.467 0.500
Oxygen 0.240 0.228 0.216 0.204 0.192 0.180
Nitrogen 0.427 0.405 0.384 0.363 0.341 0.320
               
END PO2 fsw fsw fsw fsw fsw fsw
64 1.3 146 155 166 177 190 205
71 1.4 160 170 181 193 208 224
79 1.5 173 184 196 210 225 242
86 1.6 187 199 211 226 242 260
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 380 361 342 323 304 285
Air 1620 1539 1458 1377 1296 1215


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