A place for all of your server room environment monitoring related Frequently Asked Questions including temperature, water ingress and humidity issues.
There is a waterproof version of the Temperature sensor, TMPW15 that may be rugged enough to survive being buried. I would recommend placing it in a protective tube for added protection. The sensor can connect to any monitor in the securityProbe or sensorProbe ranges.
We do have a cost-effective AKCP monitor but there are limitations as to the number of sensors that can be attached. The AKCP sensorProbe2 will monitor a variety of parameters but can only take up to 2 probes maximum, so you would require 2 of these to monitor. An alternative is the AVTECH Room Alert 4ER which comes with an internal temperature sensor and can accomodate another 3 sensors (2 x digital and 1 x switch) and will take a flood sensor (RJ11 connector into the digital port) and smoke sensor (2 wire switch connector into the switch port). As always, please contact us if you would like advice or a quotation.
The cheapest rack mountable unit is the AVTECH Room Alert 4ER, non-rack mountable options are between the AKCP sensorProbe2 and the AVTECH Room Alert 3E. All are ethernet devices and all can send alert emails to one or more addresses. All support a wide range of sensors.
Normally Open (NO) and Normally Closed (NC) terms refer to type of dry contact or wet contact. Put very simply, a Normally Open sensor will have no current when in a normal state but when it enters an alarm state it will have +5V applied to the circuit. A Normally Closed sensor will have +5V applied when in a normal state but when it enters an alarm state it will have 0V applied to it.
When you send email using regular SMTP servers the email you send is sent plain text over the network. Plain text means that, with proper network sniffiing tools, the email can be read by anybody with access to the network traffic. The internet was a much more naive place when the original SMTP standard was developed. It has since been enhanced to include an option to encrypt the email traffic when it is sent from the email client to the server.
When SNMP versions 1 and 2c were originally developed many years ago, SNMP did not include any ability to encrypt data contained within the SNMP datagrams or SNMP traps. Given that the data was never intended to flow across the public internet this was perhaps understandable. Today however security is of much greater concern for everybody. Consequently the SNMP standard has been updated to include encryption of SNMP datagrams and SNMP traps. Put simply, the SNMP traps can now encrypt the data element of the SNMP trap packet making the data secure from casual packet sniffers.
The heat index is a measure of what the temperature feels like to a person experiencing the temperature in the shade with a light wind. The heat index takes into account the temperature and humidity levels in order to approximate what the temperature will feel like.
Dew point is the temperature to which air must be cooled to become saturated with water vapour.