UM-ALPHA-140821 REV.D
Sensors
Response Time (Temperature)
Response Time Test
T90
response time is the time needed for the recorded value to reach 90 % of the actual change of applied
temperature in the conditions mentioned below.
Start Temperature :
20
℃
Target Temperature:
0
℃
Model
T90
Alpha T30/TD80/TD80S
10 minutes
Alpha TH30
10 minutes
Alpha T50X, TUX
5 minutes
MKT
MKT (Mean Kinetic Temperature) is a simplified way of expressing the overall effect of temperature fluctuations during
storage or transit of perishable goods. Calculation,
𝑇𝑚𝑘𝑡 =
ΔE/R
−ln(𝑒
− ∆𝐸
𝑅𝑇1
+ 𝑒
− ∆𝐸
𝑅𝑇2
+ ⋯ + 𝑒
− ∆𝐸
𝑅𝑇𝑛
𝑛
)
Δ
E = activation energy (
standard value: 83.144 kJ/mol
)
R = 8.314472 J/mol (universal gas constant)
T = temperature in degrees K
n = the number of sample periods over which data is collected
Note: ln is the natural log and ex is the natural log base.
Why is MKT important in the life of pharmaceuticals and perishable
goods?
The pharmaceutical and food industries are two closely regulated markets. The FDA provides regulations that require
