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

EnviroDive Services
Helium Mixing Tables for 2400 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)- 2400 PSI Cylinders
Helium & 22% EANx - 2400 PSI Cylinders
Helium & 23% EANx - 2400 PSI Cylinders
Helium & 24% EANx - 2400 PSI Cylinders
Helium & 25% EANx - 2400 PSI Cylinders
Helium & 26% EANx - 2400 PSI Cylinders
Helium & 27% EANx - 2400 PSI Cylinders
Helium & 28% EANx - 2400 PSI Cylinders
Helium & 29% EANx - 2400 PSI Cylinders
Helium & 30% EANx - 2400 PSI Cylinders
Helium & 31% EANx - 2400 PSI Cylinders
Helium & 32% EANx - 2400 PSI Cylinders
Helium & 33% EANx - 2400 PSI Cylinders
Helium & 34% EANx - 2400 PSI Cylinders
Helium & 35% EANx - 2400 PSI Cylinders
Helium & 36% EANx - 2400 PSI Cylinders

Helium & 21% (Air) - 2400 PSI Cylinders

    Helium & 21% (Air) 2400 psi cylinder      
    psi psi psi psi psi psi psi psi
Start with Helium 700 800 900 1000 1100 1200 1300 1400
Top with Air 1700 1600 1500 1400 1300 1200 1100 1000
                   
    % % % % % % % %
Helium 0.292 0.333 0.375 0.417 0.458 0.500 0.542 0.583
Oxygen 0.149 0.140 0.131 0.123 0.114 0.105 0.096 0.088
Nitrogen 0.560 0.527 0.494 0.461 0.428 0.395 0.362 0.329
                   
END PO2 fsw fsw fsw fsw fsw fsw fsw fsw
93 0.8 144 156 168 183 199 218 241 269
109 0.9 167 179 193 209 228 250 276 306
125 1.0 189 203 218 236 257 281 310 344
140 1.1 211 226 244 263 286 313 344 382
                   
Hypoxic above 7.00 10.00 13.00 16.00 20.00 24.00 29.00 35.00

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Helium & 22% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 22% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 22 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.128 0.119 0.110 0.101 0.092 0.083
Nitrogen 0.455 0.423 0.390 0.358 0.325 0.293
               
END PO2 fsw fsw fsw fsw fsw fsw
101 0.9 198 216 237 262 291 327
116 1.0 224 244 267 294 327 367
130 1.1 250 272 297 327 363 407
145 1.2 276 299 327 360 399 447
               
Hypoxic above 14.00 17.00 21.00 26.00 32.00 39.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 18 16 15 14 13 11
Top with Air 1382 1284 1185 1086 987 889

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Helium & 23% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 23% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 23 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.134 0.125 0.115 0.105 0.096 0.086
Nitrogen 0.449 0.417 0.385 0.353 0.321 0.289
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.0 213 232 254 280 311 350
121 1.1 238 258 283 311 346 388
135 1.2 262 285 311 343 380 426
149 1.3 287 311 340 374 415 464
               
Hypoxic above 12.00 15.00 19.00 24.00 29.00 36.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 35 33 30 28 25 23
Top with Air 1365 1267 1170 1072 975 877

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Helium & 24% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 24% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 24 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.140 0.130 0.120 0.110 0.100 0.090
Nitrogen 0.443 0.412 0.380 0.348 0.317 0.285
               
END PO2 fsw fsw fsw fsw fsw fsw
113 1.1 226 246 270 297 330 370
126 1.2 250 272 297 327 363 407
139 1.3 273 297 325 357 396 444
153 1.4 297 322 352 387 429 480
               
Hypoxic above 10.00 13.00 17.00 21.00 27.00 33.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 53 49 46 42 38 34
Top with Air 1347 1251 1154 1058 962 866

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Helium & 25% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 25% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 25 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.146 0.135 0.125 0.115 0.104 0.094
Nitrogen 0.438 0.406 0.375 0.344 0.313 0.281
               
END PO2 fsw fsw fsw fsw fsw fsw
105 1.1 216 235 257 284 315 354
118 1.2 239 259 284 313 347 389
130 1.3 261 284 310 341 379 425
143 1.4 284 308 337 370 411 460
               
Hypoxic above 8.00 11.00 15.00 19.00 25.00 31.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 71 66 61 56 51 46
Top with Air 1329 1234 1139 1044 949 854

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Helium & 26% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 26% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 26 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.152 0.141 0.130 0.119 0.108 0.098
Nitrogen 0.432 0.401 0.370 0.339 0.308 0.278
               
END PO2 fsw fsw fsw fsw fsw fsw
110 1.2 228 248 272 299 333 373
122 1.3 250 272 297 327 363 407
134 1.4 272 295 322 355 393 441
146 1.5 293 318 348 382 424 475
               
Hypoxic above 7.00 10.00 13.00 17.00 22.00 28.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 89 82 76 70 63 57
Top with Air 1311 1218 1124 1030 937 843

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Helium & 27% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 27% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 27 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.158 0.146 0.135 0.124 0.113 0.101
Nitrogen 0.426 0.395 0.365 0.335 0.304 0.274
               
END PO2 fsw fsw fsw fsw fsw fsw
114 1.3 239 260 285 314 348 391
126 1.4 260 283 309 340 378 423
137 1.5 281 305 334 367 407 456
148 1.6 302 328 358 394 436 488
               
Hypoxic above 5.00 8.00 11.00 15.00 20.00 26.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 106 99 91 84 76 68
Top with Air 1294 1201 1109 1016 924 832

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Helium & 28% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 28% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 28 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.163 0.152 0.140 0.128 0.117 0.105
Nitrogen 0.420 0.390 0.360 0.330 0.300 0.270
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.3 230 250 273 301 335 376
118 1.4 250 272 297 327 363 407
129 1.5 270 293 321 353 391 438
139 1.6 290 315 344 378 420 470
               
Hypoxic above 4.00 7.00 10.00 14.00 18.00 24.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 124 115 106 97 89 80
Top with Air 1276 1185 1094 1003 911 820

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Helium & 29% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 29% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 29 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.169 0.157 0.145 0.133 0.121 0.109
Nitrogen 0.414 0.385 0.355 0.325 0.296 0.266
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.3 221 240 263 290 322 361
111 1.4 240 261 286 315 349 392
121 1.5 260 282 308 339 377 422
131 1.6 279 303 331 364 404 453
               
Hypoxic above 3.00 5.00 8.00 12.00 17.00 22.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 142 132 122 111 101 91
Top with Air 1258 1168 1078 989 899 809

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Helium & 30% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 30% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 30 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.175 0.163 0.150 0.138 0.125 0.113
Nitrogen 0.408 0.379 0.350 0.321 0.292 0.263
               
END PO2 fsw fsw fsw fsw fsw fsw
94 1.3 212 231 253 279 310 348
104 1.4 231 251 275 303 337 378
114 1.5 250 272 297 327 363 407
123 1.6 269 292 319 351 389 436
               
Hypoxic above 1.00 4.00 7.00 11.00 15.00 20.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 159 148 137 125 114 103
Top with Air 1241 1152 1063 975 886 797

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Helium & 31% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 31% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 31 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.181 0.168 0.155 0.142 0.129 0.116
Nitrogen 0.403 0.374 0.345 0.316 0.288 0.259
               
END PO2 fsw fsw fsw fsw fsw fsw
88 1.3 204 222 244 269 299 336
98 1.4 222 242 265 292 325 364
107 1.5 241 262 286 315 350 393
116 1.6 259 281 308 339 376 421
               
Hypoxic above   3.00 6.00 9.00 13.00 19.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 177 165 152 139 127 114
Top with Air 1223 1135 1048 961 873 786

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Helium & 32% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 32% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 32 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.187 0.173 0.160 0.147 0.133 0.120
Nitrogen 0.397 0.368 0.340 0.312 0.283 0.255
               
END PO2 fsw fsw fsw fsw fsw fsw
83 1.3 197 215 235 260 289 325
92 1.4 215 234 256 282 314 352
101 1.5 232 253 276 305 338 380
110 1.6 250 272 297 327 363 407
               
Hypoxic above   2.00 5.00 8.00 12.00 17.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 195 181 167 153 139 125
Top with Air 1205 1119 1033 947 861 775

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Helium & 33% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 33% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 33 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.193 0.179 0.165 0.151 0.138 0.124
Nitrogen 0.391 0.363 0.335 0.307 0.279 0.251
               
END PO2 fsw fsw fsw fsw fsw fsw
78 1.3 190 207 227 251 279 314
86 1.4 207 225 247 272 303 340
95 1.5 224 244 267 294 327 367
103 1.6 241 262 287 316 351 394
               
Hypoxic above   1.00 3.00 7.00 11.00 15.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 213 197 182 167 152 137
Top with Air 1187 1103 1018 933 848 763

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Helium & 34% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 34% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 34 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.198 0.184 0.170 0.156 0.142 0.128
Nitrogen 0.385 0.358 0.330 0.303 0.275 0.248
               
END PO2 fsw fsw fsw fsw fsw fsw
73 1.3 183 200 219 242 270 303
81 1.4 200 218 239 263 293 329
89 1.5 217 236 258 285 316 355
97 1.6 233 254 278 306 340 381
               
Hypoxic above     2.00 6.00 9.00 14.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 230 214 197 181 165 148
Air 1170 1086 1003 919 835 752

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Helium & 35% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 35% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 35 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.204 0.190 0.175 0.160 0.146 0.131
Nitrogen 0.379 0.352 0.325 0.298 0.271 0.244
               
END PO2 fsw fsw fsw fsw fsw fsw
68 1.3 177 193 212 234 261 294
76 1.4 193 211 231 255 284 319
84 1.5 209 228 250 276 306 344
92 1.6 226 246 269 296 329 369
               
Hypoxic above     1.00 5.00 8.00 13.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 248 230 213 195 177 159
Air 1152 1070 987 905 823 741

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Helium & 36% EANx - 2400 PSI Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 36% EANx 2400 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 36 1400 1300 1200 1100 1000 900
               
    % % % % % %
Helium 0.417 0.458 0.500 0.542 0.583 0.625
Oxygen 0.210 0.195 0.180 0.165 0.150 0.135
Nitrogen 0.373 0.347 0.320 0.293 0.267 0.240
               
END PO2 fsw fsw fsw fsw fsw fsw
64 1.3 171 187 205 227 253 285
71 1.4 187 204 224 247 275 309
79 1.5 203 221 242 267 297 334
86 1.6 218 238 260 287 319 358
               
Hypoxic above       3.00 7.00 11.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 266 247 228 209 190 171
Air 1134 1053 972 891 810 729


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