To see accurate pricing, please choose your delivery country.
 
 
United States
£ GBP
All Shops
Important Notice for US Customers

British Wildlife

8 issues per year 84 pages per issue Subscription only

British Wildlife is the leading natural history magazine in the UK, providing essential reading for both enthusiast and professional naturalists and wildlife conservationists. Published eight times a year, British Wildlife bridges the gap between popular writing and scientific literature through a combination of long-form articles, regular columns and reports, book reviews and letters.

Subscriptions from £33 per year

Conservation Land Management

4 issues per year 44 pages per issue Subscription only

Conservation Land Management (CLM) is a quarterly magazine that is widely regarded as essential reading for all who are involved in land management for nature conservation, across the British Isles. CLM includes long-form articles, events listings, publication reviews, new product information and updates, reports of conferences and letters.

Subscriptions from £26 per year
Wildlife Survey & Monitoring  Aquatic Survey & Monitoring  Flow Meters

Mechanical Flowmeter

Manufacturer: Swale Oceanographic
  • Mechanical counter
  • Standard or low-speed rotor available
Mechanical Flowmeter
Click to have a closer look
Select product
  • Mechanical Flowmeter Standard Rotor In stock
    £678.96
    #239882 | Stock: 2
  • Mechanical Flowmeter Standard Rotor with 1-way clutch Expected delivery 30th March - 1st April
    £799.17
    #248625 | Stock: 0
  • Mechanical Flowmeter Low-Speed Rotor Expected delivery 24th March - 27th March
    £704.17
    #240781 | Stock: 0
  • Mechanical Flowmeter Low-Speed Rotor with 1-way clutch Expected delivery 12th March - 16th March
    £819.16
    #248626 | Stock: 0
Selected product: £678.96
About this product Specification Customer reviews Related products

About this product

Mechanical flowmeters are ideal for general purpose flow measurements in a range of aquatic habitats. Incorporating a precision moulded rotor connected to a six-digit counter, each revolution of the impeller is registered on the mechanical display. The number of revolutions per unit of time can be translated into stream flow velocity using a conversion chart included in the manual. 

Available with either a standard or low-speed rotor. Models are also available with a 1-way clutch so that the rotor can only work in one direction. This is useful in situations where the user wants to prevent the reading from being reversed by possible reverse flow. 

The flow meter can be attached to our 250mm300mm frame or 500mm frame plankton nets.

 

Specification

  • Total length: 213mm
  • Standard rotor diameter: 69.8mm
  • Standard rotor threshold: Approx 10 cm/sec (1/5 knot)
  • Standard rotor range: Approx 10 cm/sec (1/5 knot) to 7.9 meters/sec (15 knots).
  • Low-speed rotor diameter: 165mm
  • Low-Speed Rotor threshold: Approx 6 cm/sec (3/25 knot).
  • Low-Speed Rotor range: Approx 6 cm/sec (3/25 knot) to 100 cm/sec (approx 2 knots).
  • Weight in Air: 225g
  • Weight in Water: 113g
  • Depth Rating: Unlimited (free flooding)

Materials

  • Celcon rotor
  • Nickel-plated brass nose cone
  • Polycarbonate body
  • Armaloyed stainless steel main rotor and idler gear shafts

Customer Reviews

Manufacturer: Swale Oceanographic
  • Mechanical counter
  • Standard or low-speed rotor available
Current promotions
New and Forthcoming BooksBritish Wildlife Magazine SubscriptionField Guide Sale 2025