Spook wireless power management bundle

Spook's wireless power management bundle is designed for organisations that need to measure the power metrics for AC power to assist load balancing and determine the health of the incoming mains power.

What's in the bundle?

1 x Ethernet Gateway

Up to 3 x current transducers to measure:

  • Amp hours
  • Max RMS current
  • Min RMS current
  • Average RMS current/duty cycle for each phase
  • Combined amp hours from all phases
  • Watt hour
  • Kilowatt hour
  • Accumulated amp hour readings
Phase power

Spook wireless current meters measure the RMS (Root Mean Square) current of an alternating current (AC) system using a single (for single phase) or three (for three phase) current transformers (CTs) that wrap around the live wires of a power system. The readings are presented in real-time via OmniWatch's secure dashboards. Alerts can be set for any or all of the monitored conditions.

Principle of Operation

To measure current, clip the CT around the live wire of a powered system (clipping around a live and neutral wire at the same time will result in 0 current readings). After the sensor powers on and connects to the gateway it will begin taking measurements based on the averaging interval (5 seconds default). It will report data to Spook servers every heartbeat or in real-time if the current goes outside of the aware thresholds set on the on-board memory of the sensor.

Type 1, 2, 4, 4X, 12 and 13 NEMA rated enclosure

Spook Industrial Grade Sensors

Spook's Industrial sensors are enclosed in reliable, weatherproof NEMA-rated enclosures. The NEMA-rated enclosures are constructed for both indoor or outdoor use and protect the sensor circuitry against the ingress of solid foreign objects like dust as well as the damaging effects of water (rain, sleet, snow, splashing water, and hose-directed water).

NEMA type Description
1 General-purpose. Protects against dust, light, and indirect splashing but is not dust-tight; primarily prevents contact with live parts; used indoors and under normal atmospheric conditions.
2 Drip-tight. Similar to Type 1 but with addition of drip shields; used where condensation may be severe (as in cooling and laundry rooms).
4 and 4X Watertight. Must exclude at least 65 GPM of water from a 1 in nozzle delivered from a distance not less than 10 ft for 5 min. Used outdoors on ship docks, in dairies, in wastewater treatment plants and breweries. X (as 4X) indicates additional corrosion resistance.
12 General-purpose. Intended for indoor use, provides some protection against dust, falling dirt, and dripping non-corrosive liquids. Meets drip, dust, and rust resistance tests.
13 General-purpose. Primarily used to provide protection against dust, spraying of water and non-corrosive coolants. Meets oil exclusion and rust resistance design tests.

RMS calculator

Enter the peak voltage (V)


Enter the RMS voltage (V)


Why is RMS important?

In order to understand the amount of DC (Direct Current) power dispersed from a source the calculation is often measured as an average value over time. However, if the same method is used for AC (Alternating Current) power the result will simply produce a value of zero which is both unhelpful and inaccurate.

In order to convert the fluctuating positive and negative values into something that is useful requires the AC waveforms to be converted into DC waveforms. This is achieved by calculating the RMS (root mean square or effective voltage).

Most AC voltages are presented in terms of RMS; for example a 6V AC output could in fact have a peak of 8.6V or the mains in the UK is shown as 240V AC but can peak at around 320V.

How to calculate RMS from the peak voltage

A quick way to figure out the RMS of an AC current is to take 0.7 of the peak voltage:

Vrms = Vpeak * 0.7

How to calculate the peak voltage from RMS

This calculation can be flipped to work out the peak voltage by doing the following:

Vpeak = Vrms * 1.4

Added benefits of the wireless sensor gateway

OmniWatch easily combines both traditional wired Spook monitoring services with wireless sensor functionality. An Ethernet gateway is included in the bundle (there are options for PoE and cellular versions too). Once the gateway is installed presents a new and easy way to add flexible monitoring for additional areas. The benefit of a Spook gateway means wireless sensors can communicate with Spook file servers without the need for a PC.

Wireless sensor data collection

Each wireless sensor contains its own on-board memory. Readings are collected locally on the wireless sensor and constantly monitored for fluctuations.

If the readings are within the alarm notification levels they are passed to the gateway every 10 minutes, this ensures maximum battery life is achieved.

If the reading is above or below the desired values the data is transmitted immediately via the gateway to Spook.

The average lifetime of the batteries is 10+ years which means expensive battery replacement processes are a thing of the past. Spook also monitors the battery level and alerts are sent when replacement is required, ensuring a meaningful and easy battery management process.

Data processing

When the sensor readings are received they are compared against the relevant individual alarm settings. If the readings are within the alarm value the data is stored for future reference. If the readings are outside the alarm value invokes the alarm escalation procedure.

Spook long range wireless sensors

By investing in wireless sensor technology the installation is simple. Just position the sensors and turn them on for instant access to your secure OmniWatch dashboards.

Features of Spook long range wireless sensors

  • Wireless range of 1,200+ feet through 12+ walls
  • Frequency-Hopping Spread Spectrum (FHSS)
  • Improved interference immunity
  • Improved power management for longer battery life (12+ years on AA batteries)
  • Encrypt-RF® Security (Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages)
  • Onboard data memory stores up to 512 readings per sensor
  • Over-the-air updates (future proof)

Spook Cellular Gateway Option

This is the perfect solution for remote locations, or where an existing wired internet connection is not an option. Many Spook customers now use the cellular option to create an independent monitoring solution that is not on the LAN/WAN and therefore totally secure and independent of the organisations security policies.

On-board Battery Power Status Monitoring

The cellular gateway's onboard batteries are also monitored together with battery level status to ensure users are aware when mains power has been lost and how much onboard battery life remains.

Roaming data SIMS

Spook uses roaming data SIMS in the cellular gateway locking onto the strongest signal service provider in a region. In the unlikely event a mobile network provider has an outage, the next service provider with the strongest signal is selected. The roaming data sims have over 80 mobile service providers available including EE, Vodafone, O2 and Three UK.


Since the development of 2G technology back in the 1990's the mobile communications marketplace has developed at an ever increasing pace. 3G was introduced in 2003 and 4G superseded this in 2012 which gave the same benefits of 3G but at a much greater speed.

We now enter the realms of 5G technology which is set to revolutionise how we approach communications and the Internet of Things (IoT).

Latency time

Network typeMilliseconds (ms)
3G60ms (actual)*
4G50ms (actual)*
5G1ms (theoretical)
SIM cards

SIM technology

SIM (Subscriber Identity/Identification Module) cards have also developed at an amazing rate. SIMS were originally designed for the voice communications of a specific mobile phone operator.

However, SIMS have now been designed for use in the data industry and can be confined to carrying simple packets of data. This helps limit costs and is ideal for use in today's modern world of the IoT.

Data resilience

Data roaming is now a thing we are all used to and the latest range of Cellular Routers cater for seamless data roaming. This means locking to the mobile service operator with the strongest signal to carry the data communication. Cellular routers carry multiple mobile service providers as standard and Spook uses a manufacturer that has over 80 service providers under the bonnet including O2, Vodafone, EE and Three UK.

Convergence of Wired and Wireless Sensors

Many Spook customers have seen the benefits of adding wireless sensors to their monitoring footprint. Not only can they monitor power as described in the Spook Power Bundle above, they can extend monitoring to non-IT areas with ease. There are over 70 wireless sensor options but the most commonly used sensors are:

Find out more

If you would like more information about the Spook Power Phase Bundle please contact us below.