Thermometers Direct

Zeal Whirling Hygrometer Sling Psychrometer P2528

(Inc. 20% VAT)
(£36.00 Exc. VAT)
(2 Reviews)
29 in stock, immediate despatch
Product Code
Zeal Thermometers

Zeal Whirling Hygrometer Sling Psychrometer

The Zeal Whirling Hygrometer Sling Psychrometer offers the maximum level of accuracy for the measurement of relative humidity utilising wet and dry bulb Red Spirit filled thermometers.  The unit incorporates a water reservoir linked to the wet bulb by the means of a cotton sleeve. The Humidity is calculated using a water-soaked cotton sleeve at the bulb of the wet-bulb thermometer, how quickly the water evaporates alters the temperature of the wet-bulb thermometer. Using the specialist chart included allows you to calculate the relative humidity.

  • Measures Humidity through the measurement of air temperature
  • Mercury free

  • Temperature range: -5 to +50°C to calculate the %RH

  • Humidity: +-5%
  • Temperature: +- 1oC
PLEASE NOTE: Product may differ from image. This is a Mercury free thermometer.

Other products you may be interested in:

Zeal Spare Whirling Tube Spare thermometer
Carry pouch For Whirling Hygrometer

Customer Reviews (2)
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2 Reviews:

23 July 2016  | 

First class service

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20 February 2015  | 

good value

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Delivery Costs

Shipping And Handling

We use Royal Mail 48hr tracked, Parcelforce and DHL to deliver direct to UK mainland addresses, this will be selected based on weight and order value. You are able to upgrade your delivery to a next day service at an additional charge.

Please note shipping is charged per order, not each thermometer.

Next day delivery may be subject to delays by the courier which are outside of our control (please note that weekends and bank holidays are not classed as working days). Highlands and Islands / IV BT, IM TR 21-25, HS, KA27,28, KW1-3, 5-15, PA20-49, 62-77,61,78,PH17-26, 30-44, 49-50, ZE1-3 postcodes are sent on a 48hr service.


For those orders over £72 we will send post free to one address. However if more then one address per order, a delivery charge either £7.50 or £3.96 will be added
Once the parcels have left our premises the responsibility for delivery is with the Royal Mail or our Carrier.

Orders may be subject to delays by the courier which are outside of our control. If you experience any difficulties with the delivery of your thermometers please contact us.

Non delivery most be notified to us after 10 working days.

Please ensure all delivery information is correctly entered (including a phone number and valid email address). If we have received incorrect or inadequate information for the delivery of the goods we cannot accept any liability for late or failed delivery as a result of this.

Delivery Schedule

For orders placed Monday to Friday we aim to process your order right away. Orders placed after 2pm will be sent the next working day. Orders received after 2pm on Friday will be sent out on the following Monday (or next working day if a bank holiday)

This does not Include trade orders or purchase orders.

A calibrated thermometer if ordered in error can only be returned up to 14 days after purchase.

Purchase Orders

We accept purchase orders from the following organisations:

  • Hospitals, PCT's, NHS Foundation Trusts
  • Police Force, Fire Service
  • Councils
  • Prison Service
  • All British Military Forces

There is £50 minimum order value for all purchase orders

P&P on all Purchase Orders under £72 is £7.50 ( £6.25 Ex VAT )
P&P will be free on Orders over £72 Including VAT

Send your order by Email:-

Payment must be made within 30 days by BACS or Cheque

Zeal Thermometers