Liemke Keiler-1

• 640x512 thermal sensor: The high-resolution VOx sensor gives the Liemke Keiler-1 enough detail for reliable observation, helping distinguish animals and terrain features more clearly at typical hunting distances.
• 35 mm F 1.0 objective: The fast lens gathers more thermal radiation, which supports a brighter, more informative image and helps the device stay useful across changing weather and temperature conditions.
• Wide 12.60 ° field of view: A broad viewing angle makes scanning woodland edges, open fields, and mixed terrain faster, so it is easier to pick up movement without constantly sweeping back and forth.
• OLED display with 1024×768 resolution: The display presents the thermal image with good contrast and a clean viewing experience, reducing visual strain during longer observation sessions.
• Up to 9 h battery life with WiFi, photo and video recording: Long runtime and built-in recording functions make the monocular practical for extended outings, while WiFi adds an easy way to share or review observations.

About the Liemke Keiler Series

The Liemke Keiler series is a family of handheld thermal imaging devices built for hunters and outdoor users who need a compact observation tool rather than a rifle-mounted optic. Within the LIEMKE range, the KEILER line focuses on mobile use in the hand, with models intended for different distances and terrain types, from general-purpose scanning to longer-range observation. The series is especially suited to hunting in fields, forests, and mountainous terrain, where the balance between field of view, detection range, and portability matters more than sheer size.

A defining characteristic of the series is its pocket-sized format and controls arranged for either-hand operation, which makes the devices practical for quick checks while moving or watching from a fixed position. Across the family, models differ in sensor, lens, field of view, and detection capability, so the series covers both broader-area scanning and more distance-oriented use. As a group, KEILER monoculars are designed around straightforward handling, compact dimensions, and thermal imaging performance that supports game detection in low light, darkness, and visually cluttered environments.

About the Liemke Keiler-1

The Liemke Keiler-1 is a thermal monocular configured as an all-round observation device for mixed terrain, where the user may need to scan woodland edges one moment and check more open ground the next. Its 1.90 x base magnification gives a natural balance between image scale and situational awareness, while the 220.00 m/1000m field of view keeps enough width for efficient searching. That combination makes it well suited to general hunting observation, especially when the terrain does not favor either an ultra-wide or a highly specialized long-range setup.

At the core of the device is a 640x512 VOx uncooled sensor with 12.00 μm pixel pitch and a 50.00 Hz refresh rate. In practice, this means a detailed thermal image with smooth motion rendering when scanning or tracking movement. The 50.00 mK NETD supports usable thermal contrast in demanding conditions, while the 35.00 mm F 1.0 objective helps the monocular collect thermal information efficiently. Together with a 1750.00 m detection range, these features give the Keiler-1 the reach for spotting heat sources at distance while still remaining manageable in a compact handheld format.

The viewing experience is supported by a 1024×768 OLED display, which offers clear contrast and a comfortable image for extended use. Photo capture, video recording, and video output make the device useful not only for live observation but also for documentation and later review. WiFi connectivity adds convenient image transfer options, and the up to 9.00 h battery life is long enough for extended evening or overnight use. With its 465.00 g weight, central focusing system, and waterproof and fogproof construction, the Keiler-1 remains easy to carry and dependable in changing field conditions.

About Liemke

LIEMKE has been active in thermal imaging since 2008 and focuses on thermal imaging optics for hunting and outdoor use. The company developed its own optics from 2014 onward, which reflects a strong specialization in this category rather than a broad general sporting-optics portfolio. Its product range includes handheld devices in the KEILER line, clip-on thermal optics in the LUCHS line, and the MERLIN thermal imaging series.

Another relevant part of the brand’s development is that LIEMKE became part of the Blaser Group in 2020. For users of thermal hunting optics, that background places the company firmly in the German hunting-equipment sector, with a product focus centered on practical field use. LIEMKE devices also support image transfer to mobile devices through Wi-Fi or a cable connection, showing the brand’s emphasis on combining thermal observation with modern connectivity.

Main Features

• Product type: Thermal monocular
• Series: Liemke Keiler
• Made in: Germany
• Magnification: 1.90 x
• Objective lens diameter: 35.00 mm
• Lens aperture: F 1.0
• Field of view: 220.00 m/1000m
• Field of view (angular): 12.60 °
• Detection range: 1750.00 m
• Thermal sensor type: VOx Uncooled
• Thermal sensor resolution: 640x512
• Pixel pitch: 12.00 μm
• NETD: 50.00 mK
• Refresh rate: 50.00 Hz
• Display type: OLED
• Display resolution: 1024×768
• Image capture: Yes
• Video recording: Yes
• Video output: Yes
• Connectivity: Wifi
• Battery life: 9.00 h
• Focusing system: Central
• Dimensions: 158.00 mm x 72.00 mm x 47.00 mm
• Weight: 465.00 g
• Working temperature range: -20°C to +50°C
• Waterproof: Yes
• Fogproof: Yes
• Built-in rangefinder: No

Warranty

2 years. The Liemke Keiler-1 is covered by a 2-year manufacturer warranty.

In the Box

• Hand strap
• 1 Stk. LIEMKE BP-K Li-Ion-Akku
• Trageriemen Slim
• Neopren-Cover
• Stativ-Adapterplatte mit Schrauben und Winkelschlüssel
• Netzteil mit USB-C-Anschluss und 4 Steckeradaptern
• Kabel USB-C auf USB-A
• Optik-Reinigungstuch
• Bedienungsanleitung
• Adapter for LIEMKE carrying strap