Biomass Boiler and Industrial Sensors updated Sunday April 27, 2025
Lambdapower manufacture and sell a variety of sensors suitable for wood burning stoves, oil fired boilers, biomass boilers, industrial furnaces, drying ovens, steel annealing plants, hydrogen storage monitoring and other process control tasks and industrial-only uses. We have our own-brand replacement for LSU4-9 sensors, and an improved LSM11B replacement for most legacy applications needing the discontinued LSM11 sensors. Our own LSM11F is suitable for new designs and interfaces are available for it.
Our own LC69001 sensor is a direct upgrade for the Bosch LSU4-9 sensor used in various applications:
- Froling P4, various
- Gilles HPK-RA 30
- Herz wood burning stoves
- Stoker wood burning stoves
- Mawera
- Slurry / bio Drying furnaces
- Hoval 5 wire (non-LSM11B applications)
Main Product Listings
LPA101249 0-5v, 0-10v Analogue Output Oxygen Sensor Kit
| PRODUCT TYPE | Control Interface |
| MANUFACTURER | LAMBDAPOWER |
| OVERALL DIMENSIONS | height x width x depth: 50 x 66 x 34 mm |
| MOUNTING DETAILS | 2 off oval cutout Lugs additional to above measurements: 12 x 25 x 2.5mm , fixing screws ⌀ 4mm |
| HARNESS 1 | 1 x I/O harness (3 wires) : 500mm |
| HARNESS 2 | 1 x wideband sensor harness (6 wires) : 1500mm total consisting of 500mm (from module) + 1000mm (Sensor Harness) |
| IP PROTECTION | IP54 dust and splashproof, resin potted enclosure |
| SENSOR MAXIMUM GAS TEMPERATURE | 900°C continuous |
| SENSOR MAXIMUM GAS TEMPERATURE | 1100°C for short intervals |
| SENSOR HEX MAXIMUM TEMPERATURE | 570°C at sensor hex |
| CONTROL UNIT MAXIMUM TEMPERATURE | 125°C continuous |
Lambdapower wideband sensor interface. Single wire analogue output. 0-10v or 0-5v analogue output directly proportional to O2 content. LC-69001 Sensor is included. Interfaces easily to analogue PLC. Various voltage input and output options are available. 12VAC supply on request. All modules are made to order.
| LPA101249 LPA-10-12-49 analogue interface 0-10V output, supply 12VDC, with sensor | £149.99 All Inclusive |
| Sorry this part is temporarily unavailable. You may contact for more information |
| LPA102449 LPA-10-24-49 analogue interface 0-10V output, supply 24VDC, with sensor | £149.99 All Inclusive |
| Sorry this part is temporarily unavailable. You may contact for more information |
| LPA51249 LPA-5-12-49 analogue interface 0-5V output, supply 12VDC, with sensor | £149.99 All Inclusive |
| Sorry this part is temporarily unavailable. You may contact for more information |
| LPA52449 LPA-5-24-49 analogue interface 0-5V output, supply 24VDC, with sensor | £149.99 all inclusive |
| Sorry this part is temporarily unavailable. You may contact for more information |
LP-AD Biomass Lambda Digital 5-wire sensor interface USB
| PRODUCT TYPE | Control Unit and USB interface |
| MANUFACTURER | LAMBDAPOWER |
| PRODUCT NUMBER | Various, depends on voltage requirements |
| OVERALL DIMENSIONS | height x width x depth: 59 x 75 x 37 mm |
| MOUNTING DETAILS | 2 off Lugs additional to above measurements: 13 x 25 x 3mm , ⌀ 5mm |
| HARNESS 1 | 1 x comms / power harness (6 wires) : 250mm |
| HARNESS 2 | 1 x wideband sensor harness (6 wires) : 500mm |
| IP PROTECTION | IP54 dust and splashproof, resin potted enclosure |
Lambdapower wideband sensor interface for industrial oxygen sensor control. Interfaces easily to PC or PLC. Digital data stream and 0-5v analogue outputs. Custom designed and manufactured in the UK, this module gives an easy way to add lambda feedback data to any biomass combustion process.
Features:
- Uses our own LC69001 wideband oxygen sensor
- Reads 0% to 50.0% O2 content, approx 20.9% in free air (depending on altitude and humidity)
- IP54 rated enclosure
- 12VDC power input is required
- Digital output and USB cable included, one reading per 100mS
- 0-5V analogue output (0-20.9% only)
- Accuracy to within 0.25% O2 (0.1% for the 0-20mA version)
- Uses standard automotive sensor
Please note this product does NOT include an oxygen sensor, suitable parts are available separately (see below for LC-69001). To use with your device you will need to install a Windows/Linux/OSX/Android USB driver, a link is provided in the instructions.
Standard equipment includes:
- Potted control unit in rugged 3mm thickness ABS enclosure with multiplugged harnesses for ease of installation
- 2 metre USB cable for laptop PC data logging
- 1 metre power cable
- 1 metre analogue output cable
LP-AD Biomasse Lambda Digital & Interface analogique et USB
| TYPE DE PRODUIT | Unité de contrôle |
| FABRICANT | LAMBDAPOWER |
| NUMERO DE PRODUIT | Divers, dépend de la tension |
| DIMENSIONS | height x width x depth: 59 x 75 x 37 mm |
| MONTAGE | 2 cosses supplémentaires aux mesures ci-dessus: 13 x 25 x 3mm , ⌀ 5mm |
| HARNAIS 1 | 1 x communication / faisceau d'alimentation (6 fils) : 250mm |
| HARNAIS 2 | 1 x harnais de capteur (6 fils) : 500mm |
| PROTECTION IP | IP54 Boîtier en résine, résistant à la poussière et aux éclaboussures |
Interface de capteur wideband Lambdapower pour le contrôle de capteur d'oxygène industriel. S'interface facilement avec un PC ou un PLC. Flux de données numériques et sorties analogiques 0-5 V. Conçu et fabriqué sur mesure au EU, ce module offre un moyen facile d'ajouter des données de retour lambda à tout processus de combustion de la biomasse.
Traits:
- Utilise notre propre capteur d'oxygène à large bande LC69001
- Lit de 0% à 50,0% de teneur en O2, environ 20,9% à l'air libre (en fonction de l'altitude et de l'humidité)
- Boîtier classé IP54
- Une entrée d'alimentation 12VDC est requise
- Sortie numérique et câble USB inclus, une lecture par 100 mS
- Sortie analogique 0-5V (0-20,9% uniquement)
- Précision à 0,25% O2 près (0,1% pour la version 0-20 mA)
- Utilise un capteur automobile standard
- Version 24VDC en phase de test (décembre 2020) [contactez-nous pour plus de détails]
- Version de boucle de courant 24VDC 0-20mA en phase de test (décembre 2020) [contactez-nous pour plus de détails]
Veuillez noter que ce produit n'inclut PAS de capteur d'oxygène, les pièces appropriées sont disponibles séparément (voir ci-dessous pour LC-69001). Pour l'utiliser avec votre appareil, vous devrez installer un pilote USB Windows / Linux / OSX / Android, un lien est fourni dans les instructions.
L'équipement standard comprend:
- Unité de commande en pot dans un boîtier en ABS robuste de 3 mm d'épaisseur avec des faisceaux multiples pour faciliter l'installation
- Câble USB de 2 mètres pour l'enregistrement des données d'un PC portable
- Câble d'alimentation de 1 mètre
- Câble de sortie analogique de 1 mètre
LP-AD Biomass Lambda Digital e interface analógica USB
| Tipo de produto | Unidade de controle |
| FABRICANTE | LAMBDAPOWER |
| NÚMERO DO PRODUTO | Vários, depende de tensão |
| Dimensões | height x width x depth: 59 x 75 x 37 mm |
| MONTAGEM | 2 terminais adicionais às medidas acima: 13 x 25 x 3 mm, ⌀ 5 mm |
| CABO 1 | 1 x comms / chicote elétrico (6 fios): 250mm |
| CABO 2 | 1 x cablagem sensor de banda larga (6 fios): 500 mm |
| Proteção IP | IP54 à prova de poeira e respingos, caixa envasada de resina |
Interface de sensor de banda larga Lambdapower para controle de sensor de oxigênio industrial. Interface fácil para PC ou PLC. Fluxo de dados digital e saídas analógicas 0-5v. Projetado e fabricado de forma personalizada no Reino Unido, este módulo oferece uma maneira fácil de adicionar dados de feedback lambda a qualquer processo de combustão de biomassa.
Características:- Usa nosso próprio sensor de oxigênio de banda larga LC69001
- Lê 0% a 50,0% de conteúdo de O2, aproximadamente 20,9% no ar livre (dependendo da altitude e umidade)
- Invólucro com classificação IP54
- A entrada de energia 12VDC é necessária
- Saída digital e cabo USB incluídos, uma leitura por 100 ms
- Saída analógica 0-5V (apenas 0-20,9%)
- Precisão dentro de 0,25% O2 (0,1% para a versão 0-20mA)
- Usa sensor automotivo padrão
- Versão 24VDC em fase de teste (dezembro 2020) [entre em contato para obter detalhes]
- Versão de loop de corrente 24VDC 0-20mA em fase de teste (dezembro de 2020) [entre em contato conosco para obter detalhes]
Observe que este produto NÃO inclui um sensor de oxigênio; peças adequadas estão disponíveis separadamente (veja abaixo para LC-69001). Para usar com o seu dispositivo, você precisará instalar um driver USB Windows / Linux / OSX / Android, um link é fornecido nas instruções.
O equipamento padrão inclui:
- Unidade de controle envasada em gabinete robusto de ABS de 3 mm de espessura com chicotes múltiplos para facilidade de instalação
- Cabo USB de 2 metros para registro de dados do laptop
- Cabo de alimentação de 1 metro
- Cabo de saída analógica de 1 metro
| LP-AD analogue and digital interface with USB 12VDC | £120.00 All Inclusive |
| Sorry this part is temporarily unavailable. You may contact for more information |
LC69001 Wideband O2 Sensor BreitbandSonde
| PRODUCT TYPE | OXYGEN SENSOR |
| MANUFACTURER | LAMBDAPOWER |
| SENSOR NUMBER | LSU-4-9 |
| OVERALL LENGTH | 1000mm |
| CONDUCTOR No. | 5 |
| CONNECTOR SHELL NUMBER | 1 928 404 687 |
| STOCK NUMBER | LAMBDAPOWER BIOMASS 69001 |
| APPNOTES | Catalogue Number 13 |
| APPNOTES | Qty: 1 Stk |
| APPNOTES | Breitbandsonde Bosch |
| APPNOTES | 69001 |
| APPNOTES | Froling P4 32KW wood pellet boiler and others |
- Fits Froling P4 wood pellet boiler Froeling
- Fits EkoGren 60kW Pellet burner
- Fits boilers using part number 69001 BreitbandSonde
- Suitable replacement for 0258017025 and 0281004137.
- Uniconfort boiler
- Digital interface is available for this sensor
- Lambdapower branded with unique serial number for ISO9001 compliance
- Packed individually in sealed, static resistant, protective bags
- Consistent and guaranteed quality
- Assembled in the UK
| LC-69001 LP Biomass 69001 - Wood Pellet Boiler Oxygen Sensor | £89.00 All Inclusive |
LSM11B phase II v2.2 February 2022 onwards
| PRODUCT TYPE | OXYGEN SENSOR |
| MANUFACTURER | LAMBDAPOWER |
| PRODUCT NUMBER | LSM11B |
| PRODUCT NUMBER | Phase II |
| OVERALL LENGTH | 2500mm |
| AVAILABLE | March 2021 |
| REPLACES | BOSCH LSM-11 |
| REPLACES | 0258104002 |
| REPLACES | 0258104005 |
| REPLACES | 0258104007 |
Manufactured in the UK, we present the improved version of Lambapower's LSM11 replacement. This sensor is updated from Phase I to Phase II. Features improved sensor performance, and rewritten datasheet (version 2.x) with revised technical content, in response to customer feedback.
- Lambdapower Branded and Serial Numbered for ISO9001 compliance
- Manufactured in the UK
- Each item is individually tested - this ensures consistently high quality
- "Gold" graded sensors are available for laboratory uses (better than 15ppm accuracy)
- Naturally smooth progressive output - no annoying ADC quantisation steps or heater element MOSFET PWM switching noise typically found with digitally processed wideband sensors
- As quick as 200mS response time (Test conditions: ambient 15 minutes warmup time, then reference gas -3% O2 concentration)
- Lifespan up to 8 times better than spurious or generic sensors
- Correct heater rating is recognised immediately as LSM11 by the controller
- Professional Use Only - not for retail or DIY fitment
New Product Updates from Phase I to Phase II:
- Improved LSM11 compatibility for industrial boiler applications
- More stable output in free air and during use
- Improved hysteresis characteristics (better return-to-zero performance)
- Two-part "Power Timer" connector is now a standard part
- Thicker cables to reduce voltage losses
- Larger vents to improve resistance to fly ash
- Improved manufacturing procedures and tightened tolerances
Please note these parts are generally manufactured specially for each order. Some parts are usually available ex-stock for small orders.
Amongst others, this part fits these boilers using LSM11 four wire sensors:
- Froling
- Vigas
- Kriger (requires Instatherm® Interface)
- Woodtek (requires Instatherm® Interface)
- Hoval (requires Instatherm® Interface)
The LSM11B is unsuitable to replace 4-wire NGK OZA685-WW1 (HS Kabeltechnik 118.02-7100).
Important: The LSM11B is for trained professional use only, it is not suitable for DIY or amateur fitment, it requires specialist knowledge and training, coupled with familiarity of biomass boiler installations. No helpline is available for DIY fitment, and installation advice beyond the following datasheets will not be provided.
| LSM11B-TC industrial oxygen sensor, Two-part connector, 2.5m cable, professional use only | £187.20 All Inclusive |
| LSM11B-TYP40 industrial oxygen sensor, 4-way Single-part connector, 1m cable, professional use only | £187.20 All Inclusive |
| 2023-11-11 Deprecated, please specify LSM11B-TC; special order only please contact us |
| LSM11B-CABLE Type 40 Tyco Superseal extension cable for screw terminal header, 1.5m cable | £9.99 All Inclusive |
LSM11B typical output graphs
Example remote telemetry, 0.9MW pellet burner fitted with LSM11B sensor, Flue Oxygen Content vs Time. Boiler self-cleaning cycle every couple of hours.
A selection of randomly chosen sensors showing comparison between original LSM11 and new improved LSM11B. Adjusting the static set-point will move the graphs along the Y-axis. Shows mV output vs Oxygen content using a fan stirred heated mixture of plain air and inert reference gas in varying proportions.
Example (worst-case) deviation of LSM11B from original LSM11 output under identical conditions. This is NOT a measure of absolute accuracy, it is a measure of difference of outputs. Both the LSM11 and LSM11B will have their own deviations from the ideal curve depending on the particular sensor under test. This can be dialled out using static offset adjustment.
Example output from our own design LSM11B linearising interface to demonstrate that we can achieve five wire wideband comparable performance using a four wire sensor.
LSM11B dimensional drawing (PDF)
LSM11B Technical information (supplemental)
Typical Low Concentration PPM voltage output
| PPM | mV | PPM | mV | |
|---|---|---|---|---|
| 1000 | 85.5 | 900 | 87.8 | |
| 800 | 90.2 | 700 | 92.8 | |
| 600 | 95.8 | 500 | 99.7 | |
| 400 | 104.2 | 300 | 109.9 | |
| 200 | 118.0 | 150 | 123.8 | |
| 100 | 132.6 | 75 | 138.4 | |
| 50 | 146.5 | 25 | 161.4 | |
| 15 | 173.2 | 0 | 238.0 |
- Example typical LSM11B output for very low (ppm regime) O2 Concentration
- This test uses "Gold" Graded Sensor with free-air offset at -15mV
- Gasflow 0.5ms-1
- Ambient temperature 16°C
- 1 PPM = 0.0001%
Maximum Temperature Rating
| Parameter | Continuous | Peak |
|---|---|---|
| Maximum Gas Temperature | 900°C | 1100°C |
| Maximum Sensor Body Temperature | 400°C | 570°C |
| Biomass Boiler typical tip temp | 260°C | |
| Biomass Boiler typical body temp | 140°C |
- Temperature rating table for guidance only
- Continuous operation at maximum rating may reduce sensor life
- Operation at very high temperatures may cause output curve to shift
- In general: High gasflow tends to pull curve down
- High temperature tends to push curve upwards
Lambda Sensor Heater PSU industrial use only
| PRODUCT TYPE | SWITCHED MODE POWER SUPPLY UNIT |
| MANUFACTURER | LAMBDAPOWER |
| PRODUCT NUMBER | LP-PSU12-38 |
| OVERALL SIZE INCL CABLE GLANDS | 210mm x 70mm x 35mm |
| NOTES | Recommended for Lambda Sensor heater element on industrial installations |
Lambda Sensor power supply unit for heater element. Made in the UK. This is the only PSU we recommend as it is able to deliver full output current at switch-on.
Feature List:
- Intended for powering lambda sensor heater element
- 1500mm cables
- 100-240VAC input
- 12v DC output multiplugged for convenience
- 3.8A continuous current output capability
- Short-circuit and overcurrent protected, also has additional ceramic fuse
- Fire retardent housing
- Vented casing, convection cooled
- Suitable for all our 4-wire oxygen sensors
- Replaces poorly performing original PSU such as halogen downlighter PSU's (entirely unsuited for lambda use)
| Lambda Sensor Heater PSU | £69.99 All Inclusive |
6-wire Lambda Sensor Extension cable
| PRODUCT TYPE | Extension cable for 5-wire lambda sensors using Bosch BD1 connector including ADV sensors and LSU4-9 |
| MANUFACTURER | LAMBDAPOWER |
| PRODUCT NUMBER | EXTN-6WAY |
| OVERALL SIZE | 1.5 metre |
Six way connector and cable improved over the original by using colour coded wires rather than all-black. Made in the UK.
Feature List:
- Intended for replacement Ekogren lambda harness and other uses
- 1500mm cables
- Replaces the following part numbers:
- Deytrade 1928404900-PT
Wiring codes as follows:
| Pin Posn | Wire Colour |
|---|---|
| 1 | RED |
| 2 | YELLOW |
| 3 | WHITE |
| 4 | GREY |
| 5 | GREEN |
| 6 | BLACK |
Example connection of our 6-wire lambda sensor extension cable harness to Ekogren boiler control unit
| 6-wire Lambda Sensor Extension cable | £14.99 All Inclusive |
0258017025
| PRODUCT TYPE | OXYGEN SENSOR |
| MANUFACTURER | BOSCH |
| TRADE NUMBER | LSU-4-93 |
| OVERALL LENGTH | 1000mm |
| CONDUCTOR No. | 5 |
| ARTICLE NUMBER | LS17025 |
| EAN | 31 65143 52151 9 |
| APPNOTES | Stecker Flachkontakte |
| APPNOTES | Plug with Flat Contacts |
| APPNOTES | Breitband beheizt |
| APPNOTES | Broadband Heated Oxygen Sensor retail boxed |
Genuine Bosch, retail boxed in original packaging. Generally you can use our own 69001 listed above, but we also offer this if you are bound by type-approval.
| LP-017025 - Genuine BOSCH Oxygen Sensor Industrial Uses Only | £Please email All Inclusive |
LSM11 / 0258104002 / 0258104004 / 0258104005 / 0258104007
| PRODUCT TYPE | OXYGEN SENSOR |
| MANUFACTURER | BOSCH |
| TRADE NUMBER | LSM-11 |
| OVERALL LENGTH | 2500mm |
| CONDUCTOR No. | 4 |
| ARTICLE NUMBER | 258104002 |
| EQUIVALENT TO | 258104005 |
| SUPERCEDES | 258104001 |
| EAN | 31 65142 02939 9 |
| OEM | 1316751 |
| OEM | 12153369 |
| OEM | 51 11614 0003 |
| OEM | 001 542 73 18 |
| OEM | 919 125 70 46 |
| OEM | 6 0545 02 0 0003 |
| OEM | 9226595 |
| APPNOTES | Various wood / biomass boilers |
All LSM11 parts were discontinued by Bosch during March 2017. Our stock ran out March 2019. We have alternative parts available on this page. See LSM11B