Sample and Report Rates
62.5 ms 125 ms 250 ms 500 ms 1 second 2 seconds 16 seconds
2 0.20 0.40 0.72 1.27 2.05 2.99 5.07
Note, battery life calculations are based on the sensor operating 24 hours a day, 365 days a year.
SM312DQD-78419
Bi10U-M30-AP6X-H1141
0
1
2
3
4
5
6
7
62.5 ms 125 ms 250 ms 500 ms 1 sec 2 sec 16 sec
DX81 Battery Life (Years)
Sample and Report Rates
For each sensor characterized, a boost voltage and warmup time was specified. The sample and reports rates were varied
to calculate the estimated battery life. For example, a Banner Optical sensor, model SM312DQD-78419, set to a boost
voltage of 5 volts, a warm-up time of 4 milliseconds, and a sample and report rate of 16 seconds, should have a battery
life of just over 6 years.
The curves for discrete devices represent a “worst case” as far as battery use because we are assuming for each sample of
the sensor’s output a change in state has occurred (e.g., target present to target absent or vice versa), sending a radio
message from Node to Gateway. No messaging occurs unless there is a change to report. Actual battery life depends on
how many state changes actually occur.
All battery life calculations are approximations based on a strong radio signal. Weaker radio connections and missed pack-
ets will decrease the battery life.
8.3.3 Temperature and Humidity Sensor
The following battery life calculations are based on reading/reporting one register or reading/reporting the contents of all
three registers.
SureCross DX80 and Performance DX80 Product Manual
72 www.bannerengineering.com - tel: 763-544-3164 Rev. J
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