Overview
- Besides temperature, the concentration of chemicals can also affect the velocity of sound in fluids. In the application of ultrasonic flow meters, these factors must be taken into account to ensure accurate flow monitoring.
- Ultrasonic flow meters rely on the fluid's speed of sound for flow calculation, which is influenced by temperature. We provide a data table of the speed of sound at different temperatures in water to help users measure fluid flow more accurately.
- Understanding the speed of sound at different temperatures is key to ensuring the correct operation of ultrasonic flow meters. Users can refer to our speed of sound table and accordingly set the temperature in the flow meter to obtain more accurate flow data.
In this piece, LORRIC lists the relationship between water temperature (Fahrenheit/Celsius) and the speed of sound (meters/feet) in a data table. Refer to the following table and set it in the ultrasonic flow meter to achieve the desired data results.
1. Fluids exhibit different sound velocities at different temperatures
Ultrasonic flow meters primarily calculate flow based on the sound velocity of the liquid being measured. However, liquid sound velocity can be affected by two common factors: temperature and chemical concentration.
Apart from factors such as external diameter, wall thickness, and probe setup, the state of the fluid greatly affects the measurement accuracy of ultrasonic flow meters. Since fluids exhibit different sound velocities at different temperatures, the value of the sound velocity also impacts the flow calculation of the ultrasonic flow meter.
2. Speed of Sound in Water Temperature Table
| Temperature |
Speed of sound in water |
| °C |
°F |
m/s |
ft/s |
| 0 |
32 |
1402 |
4600 |
| 1 |
33.8 |
1407 |
4616 |
| 2 |
35.6 |
1412 |
4633 |
| 3 |
37.4 |
1417 |
4649 |
| 4 |
39.2 |
1421 |
4662 |
| 5 |
41 |
1426 |
4679 |
| 6 |
42.8 |
1430 |
4692 |
| 7 |
44.6 |
1434 |
4705 |
| 8 |
46.4 |
1439 |
4721 |
| 9 |
48.2 |
1443 |
4734 |
| 10 |
50 |
1447 |
4748 |
| 11 |
51.8 |
1451 |
4761 |
| 12 |
53.65 |
1455 |
4774 |
| 13 |
55.4 |
1458 |
4784 |
| 14 |
57.2 |
1462 |
4797 |
| 15 |
59 |
1465 |
4807 |
| 16 |
60.8 |
1469 |
4820 |
| 17 |
62.6 |
1472 |
4830 |
| 18 |
64.4 |
1476 |
4843 |
| 19 |
66.2 |
1479 |
4853 |
| 20 |
68 |
1482 |
4862 |
| 21 |
69.8 |
1485 |
4872 |
| 22 |
71.6 |
1488 |
4882 |
| 23 |
73.4 |
1491 |
4892 |
| 24 |
75.2 |
1493 |
4899 |
| 25 |
77 |
1496 |
4908 |
| 26 |
78.8 |
1499 |
4918 |
| 27 |
80.6 |
1501 |
4925 |
| 28 |
82.4 |
1504 |
4935 |
| 29 |
84.2 |
1506 |
4941 |
| 30 |
86 |
1509 |
4951 |
| 31 |
87.8 |
1511 |
4958 |
| 32 |
89.6 |
1513 |
4964 |
| 33 |
91.4 |
1515 |
4971 |
| 34 |
93.2 |
1517 |
4977 |
| 35 |
95 |
1519 |
4984 |
| 36 |
96.8 |
1521 |
4990 |
| 37 |
98.6 |
1523 |
4997 |
| 38 |
100.4 |
1525 |
5004 |
| 39 |
102.2 |
1527 |
5010 |
| 40 |
104 |
1528 |
5013 |
| 41 |
105.8 |
1530 |
5020 |
| 42 |
107.6 |
1532 |
5026 |
| 43 |
109.4 |
1534 |
5033 |
| 44 |
111.2 |
1535 |
5036 |
| 45 |
113 |
1536 |
5040 |
| 46 |
114.8 |
1538 |
5046 |
| 47 |
116.6 |
1539 |
5049 |
| 48 |
118.4 |
1540 |
5053 |
| 49 |
120.2 |
1541 |
5056 |
| 50 |
122 |
1543 |
5063 |
| 51 |
123.8 |
1543 |
5063 |
| 52 |
125.6 |
1544 |
5066 |
| 53 |
127.4 |
1545 |
5069 |
| 54 |
129.2 |
1546 |
5072 |
| 55 |
131 |
1547 |
5076 |
| 56 |
132.8 |
1548 |
5079 |
| 57 |
134.6 |
1548 |
5079 |
| 58 |
116.6 |
1549 |
5082 |
| 59 |
138.2 |
1550 |
5086 |
| 60 |
140 |
1550 |
5086 |
| 61 |
141.8 |
1551 |
5089 |
| 62 |
143.6 |
1552 |
5092 |
| 63 |
145.5 |
1552 |
5092 |
| 64 |
147.2 |
1553 |
5095 |
| 65 |
149 |
1553 |
5095 |
| 66 |
150.8 |
1553 |
5099 |
| 67 |
152.6 |
1554 |
5099 |
| 68 |
154.5 |
1554 |
5099 |
| 69 |
156.2 |
1554 |
5099 |
| 70 |
158 |
1554 |
5099 |
| 71 |
159.8 |
1554 |
5099 |
| 72 |
161.6 |
1555 |
5102 |
| 73 |
163.4 |
1555 |
5102
|
| 74 |
165.2 |
1555 |
5102
|
| 75 |
167 |
1555 |
5102
|
| 76 |
168.8 |
1555 |
5102
|
| 77 |
170.6 |
1554 |
5099 |
| 78 |
172.4 |
1554
|
5099
|
| 79 |
174.2 |
1554 |
5099 |
| 80 |
176 |
1554 |
5099 |
| 81 |
177.8 |
1554
|
5099 |
| 82 |
179.6 |
1553 |
5095 |
| 83 |
181.4 |
1553 |
5095 |
| 84 |
183.2 |
1553 |
5095 |
| 85 |
183 |
1552 |
5092 |
| 86 |
183.2 |
1552 |
5092 |
| 87 |
183 |
1552 |
5092 |
| 88 |
190.4 |
1551 |
5089 |
| 89 |
192.2 |
1551 |
5089 |
| 90 |
194 |
1550 |
5086 |
| 91 |
195 |
1549 |
5082 |
| 92 |
197.6 |
1549 |
5082 |
| 93 |
199.4 |
1548 |
5079 |
| 94 |
201.2 |
1547 |
5076 |
| 95 |
203 |
1547 |
5076 |
| 96 |
204.8 |
1546 |
5072 |
| 97 |
206.6 |
1545 |
5069 |
| 98 |
208.4 |
1544 |
5066 |
| 99 |
210.2 |
1543 |
5063 |
| 100 |
212 |
1543 |
5063 |
| 104 |
220 |
1538 |
5046 |
| 110 |
230 |
1532 |
5026 |
| 116 |
240 |
1524 |
5000 |
| 121 |
250 |
1526 |
5007 |
| 127 |
260 |
1507 |
4944 |
| 132 |
270 |
1497 |
4912 |
| 138 |
280 |
1487 |
4879 |
| 143 |
290 |
1476 |
4843 |
| 149 |
300 |
1465 |
4807 |
| 154 |
310 |
1453 |
4767 |
| 160 |
320 |
1440 |
4725 |
| 166 |
330 |
1426 |
4679 |
| 171 |
340 |
1412 |
4633 |
| 177 |
350 |
1398 |
4587 |
| 182 |
360 |
1383 |
4538 |
| 188 |
370 |
1368 |
4488 |
| 193 |
380 |
1353 |
4439 |
| 199 |
390 |
1337 |
4387 |
| 204 |
400 |
1320 |
4331 |
| 210 |
410 |
1302 |
4272 |
| 216 |
420 |
1283 |
4210 |
| 221 |
430 |
1264 |
4147 |
| 227 |
440 |
1244 |
4082 |
| 232 |
450 |
1220 |
4003 |
| 238 |
460 |
1200 |
3937 |
| 243 |
470 |
1180 |
3872 |
| 249 |
480 |
1160 |
3806 |
| 254 |
490 |
1140 |
3740 |
| 260 |
500 |
1110 |
3642 |