The occupancy sensor at work have REALLY short timeouts.

Occupancy.py

try:
    import RPi.GPIO as GPIO
except RuntimeError:
    print("Error importing RPi.GPIO!  This is probably because you need superuser privileges.  You can achieve this by using 'sudo' to run your script")

import time
import random 
import pytz
from datetime import datetime

# microsecond sleep for ultrasonic trigger
usleep = lambda x: time.sleep(x/1000000.0)

CHANNEL = 14 # Pin 08 on the RaspPi

GPIO.setmode(GPIO.BCM)
GPIO.setup(CHANNEL, GPIO.OUT)

def isBusinessHours():
    today = datetime.now(pytz.utc).astimezone(pytz.timezone('America/Los_Angeles'))
    # 8am to 5pm, Mon (0) to Friday (4)
    if 8 <= today.hour < 17 and today.weekday() < 5:
        return True
    return False

def trigger():
    GPIO.output(CHANNEL, 1)
    usleep(10)
    GPIO.output(CHANNEL, 0)


def blast():
    for x in range(0, 200):
        trigger()
        usleep(random.randint(50, 200))

try:
    while 1:
        if isBusinessHours():
            print("Blasting ultrasonic during business hours")
            blast()
        else:
            print("Office is closed, no ultrasonic please")
        time.sleep(30)

except KeyboardInterrupt: # If CTRL+C is pressed, exit cleanly:
    GPIO.cleanup() # cleanup all GPIO