Pettersson D240X Bat Detector

£843.00 Ex. VAT
In stock

An easy-to-use combined heterodyne and time expansion bat detector.


The Pettersson D240X is a combined heterodyne and time expansion detector. It allows you to convert ultrasonic bat calls into distinctive audible sounds, whilst capturing fragments of time that contain useful call information. 

Key Features: 

  • Easily adjusted with wheel frequency and volume controls on the side
  • Easy-to-use functions like a back-lit screen with a large digit display, which shows the frequency in the heterodyne mode.
  • Compatible with stereo headphones: hear the heterodyne signal on the left channel and the time expansion signal on the right channel
  • Built-in speaker - switch between the heterodyne or time expansion signal
  • Compatible with digital recorders such as the R-05 Edirol or Tascam DR-40 enabling you to record the time expanded calls for analysis on a PC. If the recorder has a "voice-activated" recording mode, the detector can be left in the field for unattended recording of bat calls


Technical Specifications

Weight (g): 170
Dimensions (mm): 119 × 60 × 25
Type: heterodyne and time expansion (x10 or x20 – selectable via switch)
Comment switch: Yes
Outputs: 2 x 3.5 mm jacks for headphones and tape recorder
Battery: 1 x IEC 6LF22 (9V)
Quiescent current: 30 mA typ. (replay) including LCD backlight

Microphone: Advanced electret
Frequency range (kHz): 10-120 (min.)
Display accuracy (kHz): ± 0.15
Bandwidth: 8 kHz (+/- 4 kHz), -6 dB
Sampling frequency (kHz): 307
Resolution (bits): 8

Storage time: 3.4, 1.7 or 0.1 sec. (selectable via switch)
Trigger modes: Manual, level – broadband, level – narrowband
Pretrigger: 50% of the selected storage time
Memory size: 1M x 8

Miscellaneous: Overload indicator, adjustable input gain, replay of signal in memory through heterodyne system


Warranty: 1 Year

We now offer FREE UK SHIPPING for online orders over £75 to the UK mainland (under 20kg), including service & repair items. For information on qualifying requirements for free shipping, please see our delivery page.

We aim for next working day delivery on all UK mainland orders received before 2.30pm. Where products need to be made to order or are not a regular stock item, or during busy times of year, despatch times may be longer.

If your order is urgent please call us on 01451 833 181. There is usually an additional charge for timed delivery.

We will always use a reputable courier company and require a signature on delivery. Smaller items are usually shipped using Royal Mail or DPD, and larger items are sent using TNT or Tuffnells. Palletised deliveries are with Pallex.

We will email you shipping confirmation after your order has been despatched. Where available, you will also receive tracking notification by email or text. If you need to track your parcel urgently then please contact us.

We can deliver to anywhere in the world, but you may need to contact us for a quote.

If your order doesn’t qualify for free shipping then UK mainland delivery starts at £7.92 ex VAT, while Highlands and Islands delivery starts at £12.50. You can calculate shipping costs using the basket.

For full delivery information please click here.

Important Information About Backorders

At Wildcare there are times when items are only available on a backorder basis, either due to high demand or if the item is a special order item. We refer to these as ‘backorder items.

Backorder items are clearly listed on our website as ‘Order To Reserve Stock (Backorder)’. Items that are in stock and ready to be shipped immediately are listed as ‘In Stock’.

When you place an order for a back order item or an order that includes back order items, a member of our team will be in contact within 48 hours of your order to confirm the lead time for delivery. For any queries before then, please call us on: 01451 833 181

Avoiding Disappointment

We cannot guarantee that a backordered item will come back into stock or be delivered for a specific date, however we will always do our best to keep you informed and updated.

If your back order is urgent or required within a specific time frame we suggest to call us on 01451 833 181 so we can keep your requirements in mind throughout the waiting period.


If you receive damaged items or the wrong goods, please let us know straight away so that we can arrange for them to be returned to us and replaced as quickly as possible.

You will need to obtain a Returns Number  - please call us on 01451 833 181 or email [email protected]

Please return goods, WITH THE RETURNS NUMBER MARKED ON THE PARCEL to: Wildcare, Eastgate House, Moreton Road, Longborough, GL56 0QJ

We may ask for a photograph any damaged items before we agree to replace them.

Please click here to view our full returns policy.