The technical specification of item MEE 71 should read as follows:
Hydraulics bench mounted on lockable castor wheels and is constructed around a sturdy framework onto which all elements of the hydraulics bench are mounted. The main water storage tank from which the electrically operated external pump takes its water is situated on the framework. An on/off control on the front of the frame, together with a safety cut out controls the pump, Storage tank capacity: 75 litres, Centrifugal pump: 0.365kw, Single phase, 230V AC pump supplied as standard, Single Pump: approx. 30L/m, Safety cut out, On/off switch, Lockable castor 
wheels, Twin 240V waterproof electrical output, Includes 21 channel data logger with 48 screw terminals, push-on edge connection and 20 external channels, 1 internal channel (mains Voltage). USB cable to PC USB port. Can be used via a USB splitter with up to 3 loggers. Differential voltage inputs (±100mv DC). Eight single ended DC voltage inputs (±8v), Four logic or frequency inputs, On board 12v DC, ±5V DC (optional ±15v DC power supplies) . Utilises HDL software has a curve-fitting Calibrate facility that allows manual input of the desired display value followed by a Read button to record the transducer output. Two such pairs will produce a linear fit or four pairs, a polynomial fit. The result is stored in memory automatically; Characteristic curves for Type K and Type T thermocouples are resident in memory. Each temperature channel can be modified. Hydraulics Bench for supply of water to a wide range of modules. Self-contained floor standing bench fitted with lockable castor wheels. Closed system for re-use of water.

Including ten training modules: 

1. Free & forced vortices, 
2. Bernoulli’s theorem demonstration, 
3. Orifice & venturi flow measurement, 
4. Pressure loss in bends & fittings 
5. Center of pressure Module,
6. Impact of a jet module, 
7. Osborne reynold's, 
8. Flow meter module, 
9. Series and parallel pump upgrade, 
10. Pressure and throttle module