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Helium Blending Tables

Enviro Dive Services
Helium Mixing Tables for 3500 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)- 3500 PSI Cylinders
Helium & 22% EANx - 3500 PSI Cylinders
Helium & 23% EANx - 3500 PSI Cylinders
Helium & 24% EANx - 3500 PSI Cylinders
Helium & 25% EANx - 3500 PSI Cylinders
Helium & 26% EANx - 3500 PSI Cylinders
Helium & 27% EANx - 3500 PSI Cylinders
Helium & 28% EANx - 3500 PSI Cylinders
Helium & 29% EANx - 3500 PSI Cylinders
Helium & 30% EANx - 3500 PSI Cylinders
Helium & 31% EANx - 3500 PSI Cylinders
Helium & 32% EANx - 3500 PSI Cylinders
Helium & 33% EANx - 3500 PSI Cylinders
Helium & 34% EANx - 3500 PSI Cylinders
Helium & 35% EANx - 3500 PSI Cylinders
Helium & 36% EANx - 3500 PSI Cylinders

Helium & 21% EANx - 3500 psi Cylinders

    Helium & 21% (Air) 3500 psi cylinder      
    psi psi psi psi psi psi psi psi
Start with Helium 700 800 900 1000 1100 1200 1300 1400
Top with Air 2800 2700 2600 2500 2400 2300 2200 2100
                   
    % % % % % % % %
Helium 0.200 0.229 0.257 0.286 0.314 0.343 0.371 0.400
Oxygen 0.168 0.162 0.156 0.150 0.144 0.138 0.132 0.126
Nitrogen 0.632 0.609 0.587 0.564 0.542 0.519 0.497 0.474
                   
END PO2 fsw fsw fsw fsw fsw fsw fsw fsw
93 0.8 124 130 136 143 150 158 167 177
109 0.9 144 150 157 165 173 182 192 203
125 1.0 163 171 179 187 196 206 217 229
140 1.1 183 191 200 209 219 230 242 255
                   
Hypoxic above 3.00 4.00 6.00 7.00 9.00 11.00 12.00 15.00



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Helium & 22% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 22% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 22 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.157 0.151 0.145 0.138 0.132 0.126
Nitrogen 0.557 0.535 0.513 0.490 0.468 0.446
               
END PO2 fsw fsw fsw fsw fsw fsw
101 0.9 156 164 172 182 192 203
116 1.0 177 186 195 206 217 230
130 1.1 198 208 218 230 242 256
145 1.2 219 230 241 253 267 282
               
Hypoxic above 5.00 7.00 9.00 10.00 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 32 30 29 28 27 25
Top with Air 2468 2370 2271 2172 2073 1975



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Helium & 23% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 23% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 23 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.164 0.158 0.151 0.145 0.138 0.131
Nitrogen 0.550 0.528 0.506 0.484 0.462 0.440
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.0 168 176 185 195 206 218
121 1.1 188 197 207 218 230 243
135 1.2 208 218 229 241 254 268
149 1.3 228 239 251 264 278 293
               
Hypoxic above 4.00 5.00 7.00 9.00 11.00 13.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 63 61 58 56 53 51
Top with Air 2437 2339 2242 2144 2047 1949



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Helium & 24% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 24% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 24 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.171 0.165 0.158 0.151 0.144 0.137
Nitrogen 0.543 0.521 0.499 0.478 0.456 0.434
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.0 160 168 176 186 196 208
113 1.1 179 188 197 208 219 232
126 1.2 198 208 218 230 242 256
139 1.3 217 228 239 251 265 280
               
Hypoxic above 2.00 4.00 5.00 7.00 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 95 91 87 84 80 76
Top with Air 2405 2309 2213 2116 2020 1924



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Helium & 25% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 25% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 25 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.179 0.171 0.164 0.157 0.150 0.143
Nitrogen 0.536 0.514 0.493 0.471 0.450 0.429
               
END PO2 fsw fsw fsw fsw fsw fsw
105 1.1 170 179 188 198 209 221
118 1.2 189 198 208 219 231 244
130 1.3 207 217 228 240 253 267
143 1.4 226 237 248 261 275 290
               
Hypoxic above 1.00 2.00 4.00 5.00 7.00 9.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 127 122 116 111 106 101
Top with Air 2373 2278 2184 2089 1994 1899



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Helium & 26% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 26% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 26 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.186 0.178 0.171 0.163 0.156 0.149
Nitrogen 0.529 0.507 0.486 0.465 0.444 0.423
               
END PO2 fsw fsw fsw fsw fsw fsw
110 1.2 180 189 199 209 221 234
122 1.3 198 208 218 230 242 256
134 1.4 216 226 237 250 263 278
146 1.5 234 245 257 270 284 300
               
Hypoxic above   1.00 2.00 4.00 6.00 7.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 158 152 146 139 133 127
Top with Air 2342 2248 2154 2061 1967 1873



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Helium & 27% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 27% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 27 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.193 0.185 0.177 0.170 0.162 0.154
Nitrogen 0.521 0.501 0.480 0.459 0.438 0.417
               
END PO2 fsw fsw fsw fsw fsw fsw
114 1.3 189 199 209 220 232 245
126 1.4 207 217 227 239 252 266
137 1.5 224 234 246 259 273 288
148 1.6 241 252 265 278 293 309
               
Hypoxic above     1.00 2.00 4.00 6.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 190 182 175 167 159 152
Top with Air 2310 2218 2125 2033 1941 1848



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Helium & 28% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 28% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 28 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.200 0.192 0.184 0.176 0.168 0.160
Nitrogen 0.514 0.494 0.473 0.453 0.432 0.411
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.3 182 190 200 211 222 235
118 1.4 198 208 218 230 242 256
129 1.5 215 225 236 248 262 276
139 1.6 231 242 254 267 281 297
               
Hypoxic above       1.00 3.00 5.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 222 213 204 195 186 177
Top with Air 2278 2187 2096 2005 1914 1823



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Helium & 29% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 29% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 29 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.207 0.199 0.191 0.182 0.174 0.166
Nitrogen 0.507 0.487 0.467 0.446 0.426 0.406
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.3 174 183 192 202 214 226
111 1.4 190 199 209 220 233 246
121 1.5 206 216 227 239 251 266
131 1.6 222 233 244 257 270 286
               
Hypoxic above         2.00 3.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 253 243 233 223 213 203
Top with Air 2247 2157 2067 1977 1887 1797



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Helium & 30% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 30% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 30 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.214 0.206 0.197 0.189 0.180 0.171
Nitrogen 0.500 0.480 0.460 0.440 0.420 0.400
               
END PO2 fsw fsw fsw fsw fsw fsw
94 1.3 167 176 185 195 205 217
104 1.4 183 192 201 212 224 237
114 1.5 198 208 218 230 242 256
123 1.6 213 224 235 247 260 275
               
Hypoxic above           2.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 285 273 262 251 239 228
Top with Air 2215 2127 2038 1949 1861 1772



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Helium & 31% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 31% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 31 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.221 0.213 0.204 0.195 0.186 0.177
Nitrogen 0.493 0.473 0.453 0.434 0.414 0.394
               
END PO2 fsw fsw fsw fsw fsw fsw
88 1.3 161 169 178 187 198 209
98 1.4 176 184 194 204 215 228
107 1.5 191 200 210 221 233 246
116 1.6 205 215 226 238 251 265
               
Hypoxic above           1.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 316 304 291 278 266 253
Top with Air 2184 2096 2009 1922 1834 1747



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Helium & 32% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 32% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 32 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.229 0.219 0.210 0.201 0.192 0.183
Nitrogen 0.486 0.466 0.447 0.427 0.408 0.389
               
END PO2 fsw fsw fsw fsw fsw fsw
83 1.3 155 163 171 180 190 202
92 1.4 169 178 187 197 208 220
101 1.5 184 193 202 213 225 238
110 1.6 198 208 218 230 242 256
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 348 334 320 306 292 278
Top with Air 2152 2066 1980 1894 1808 1722



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Helium & 33% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 33% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 33 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.236 0.226 0.217 0.207 0.198 0.189
Nitrogen 0.479 0.459 0.440 0.421 0.402 0.383
               
END PO2 fsw fsw fsw fsw fsw fsw
78 1.3 149 157 165 174 184 195
86 1.4 163 171 180 190 200 212
95 1.5 177 186 195 206 217 230
103 1.6 191 200 210 222 234 247
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 380 365 349 334 319 304
Top with Air 2120 2035 1951 1866 1781 1696



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Helium & 34% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 34% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 34 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.243 0.233 0.223 0.214 0.204 0.194
Nitrogen 0.471 0.453 0.434 0.415 0.396 0.377
               
END PO2 fsw fsw fsw fsw fsw fsw
73 1.3 144 151 159 168 177 188
81 1.4 157 165 174 183 193 205
89 1.5 171 179 189 199 210 222
97 1.6 184 193 203 214 226 239
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 411 395 378 362 346 329
Air 2089 2005 1922 1838 1754 1671



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Helium & 35% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 35% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 35 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.250 0.240 0.230 0.220 0.210 0.200
Nitrogen 0.464 0.446 0.427 0.409 0.390 0.371
               
END PO2 fsw fsw fsw fsw fsw fsw
68 1.3 139 146 154 162 171 182
76 1.4 152 160 168 177 187 198
84 1.5 165 173 182 192 203 215
92 1.6 178 187 197 207 218 231
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 443 425 408 390 372 354
Air 2057 1975 1892 1810 1728 1646



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Helium & 36% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 36% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 36 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.257 0.247 0.237 0.226 0.216 0.206
Nitrogen 0.457 0.439 0.421 0.402 0.384 0.366
               
END PO2 fsw fsw fsw fsw fsw fsw
64 1.3 134 141 148 157 166 176
71 1.4 147 154 162 171 181 192
79 1.5 160 168 176 186 196 208
86 1.6 172 181 190 200 211 224
               
Hypoxic above            
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Helium 1000 1100 1200 1300 1400 1500
Oxygen 475 456 437 418 399 380
Air 2025 1944 1863 1782 1701 1620



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