DS18B20 Temperature Sensor
$20
$50
HOSIDEN HLM8619
$55
$100
DHI-NVR4232-4KS2
$275
$305
Hikvision DS-2CD1141-I
$79
$85
Meanwell DIN Rail Mounted Power Supply DR-30-5V/DR-30-12V/DR-30-15V/DR-30-24V