UV is our Business

Large bande UV

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SG01Q-5
UVA+UVB+UVC, quadrant photodiode, surface active = 4 x 1.4 mm², structure TO5 courtePrix unitaire: 582,00€Description du produit
- large bande UV (UVA+UVB+UVC) quadrant photodiode
- surface du détecteur 4 x 1.4 mm², 32 µm pitch
- conçu pour les applications d’ajustement du faisceau laser UV, autocollimateurs et d’autres applications de détection de position de faisceau d’UV
- structure plate TO5 encapsulée hermétiquement
- une irradiation de 10 µW/cm² à 280 nm (sensibilité du pic) produit un courant d’environ 22 nA / pixel
- chip de photodiode UV SiC à grande résistance aux radiations (déterminé par le PTB)
SG01XXL-8ISO90
UVA+UVB+UVC, surface active = 36.00 mm², structure TO8 courte, isoléePrix unitaire: 3600,00€Description du produit
- large bande UV (UVA+UVB+UVC)
- surface du détecteur 36.00 mm²
- structure plateTO8 encapsulée hermétiquement deux contacts isolés, un contact supplémentaire à la masse
- une irradiation de 10 µW/cm² à 280 nm (sensibilité du pic) produit un courant d’environ 576 nA
- chip de photodiode UV SiC à grande résistance aux radiations (déterminé par le PTB)

Nous vous conseillons avec plaisir sur ce produit

Romana Sonnenberg
Dipl.-Ing.

+49 (0) 30 53015211

Tilman Weiss
Dr.-Ing.

+49 (0) 30 53015211

Photodiodes UV FAQ

Why are there photodiodes with different chip active areas?

Summary:
Decreasing irradiance requires increasing chip active area. If the irradiance to be measured is unknown, an L-chip photodiode should be used for prototypes.
Detailed answer:
The active area of the chip determines how many photons can be collected by a photodetector. Semiconductor detectors, such as SiC UV photodiodes, convert photons into an electrical current, the photocurrent I. This photocurrent increases linearly with the irradiance and the active area of the chip. Since the price of the detector increases with the active area, the choice of area is essentially a compromise between cost and photocurrent. If you know the minimum and maximum irradiance you wish to measure with the UV photodiode, the following simplified formula gives a rough estimate of the photocurrent I for a given chip active area AChip. I=Achip *Eλ *1000 where I is the photocurrent in nA, A is the active chip area in mm² (enter values of 0.06 or 0.2 or 0.5 or 1 or 1.82 or 7.6 or 36) and Eλ is the spectral irradiance of the UV light source you like to measure in mW/cm². The minimum current (photodiode output at the lowest irradiance to be measured) should not be less than 500pA. If you do not know Eλ, the L-chip (1.00mm²) type photodiode should be used for a first evaluation step.

When do I need a broadband photodiode and when do I need filtered photodiodes for UVA, UVB, UVC or UV index?

Summary:
For UV measurement, unfiltered broadband SiC is used by default
Detailed answer:
By default, unfiltered broadband SiC is used for UV measurements. If a UV source also emits radiation that must not contribute to the sensor’s signal (e.g. UV medium pressure lamps used for water or air purification that also emit non-germicidal UV radiation), a filtered SiC detector (UVC, UVB+C or UVA only) should be selected.

Which photodiode do I use for 185nm and 172nm?

Summary:
Our SiC-VUV photodiodes are used here.
Detailed answer:
Our standard SiC photodiodes only have a low sensitivity below 220nm. Below approx. 200nm they have they no longer have any sensitivity. For applications where radiation below 220nm needs to be measured, our VUV (“vaccum UV”) photodiodes are used. Typical applications are the destruction (cracking) of organic carbons in fat or in water (TOC) at 185nm or the matting of paints at 172nm. VUV photodiodes are also used to monitor PFAS photolysis.

Do you produce SMD type photodiodes?

Summary:
Yes, but we do not recommend their use.
Detailed answer:
Yes, we manufacture 3535 SMD type photodiodes (ceramic package), but we recommend the use of metal TO photodiodes. The packaging and hermetic sealing of photodiode chips in metal TO housings with a fused glass window is a mature and extremely reliable process that has been in use for more than 50 years. A TO-packaged sglux SiC UV photodiode is usually the most reliable and durable component in a product, even when exposed to very high UV radiation or operated at high temperature levels. However, recent progress in the development of long life UV LEDs, also in the UVC range, allow UV low pressure tubes to be replaced by these LEDs, resulting in a significant potential reduction in product dimensions. The miniaturization of products such as UV transmittance measurement modules or point-of-use LED UVC disinfection modules allows our customers to move into new areas of application. Sometimes our TO-packaged UV photodiodes are considered too bulky. Our SiC SMD photodiode range is designed for these applications. The package consists of a ceramic body with a mineral window glass to make these SMD photodiodes as reliable as possible. However, TO type photodiodes remain the best choice in terms of durability, reliability and price.

You produce photodiodes with 2 pins and with 3 pins. What is the third pin good for?

Summary:
By default, 2-pin photodiodes are used.
Detailed answer:
By default, 2-pin photodiodes are used. One pin is connected to the metal body of the photodiode and to the anode. The other pin is isolated and connected to the cathode. A 3-pin photodiode is characterized by two isolated pins (connected to the anode and cathode) and one pin connected to the metal case. The 3-pin photodiode is used if the photodiode package is in contact with metal components of the customer's product.

What is the response time of a SiC photodiode?

Summary:
The response time is about 190ps (FWHM).
Detailed answer:
At the Helmholtz-Zentrum Berlin, investigations were carried out on pulse excitation with 266 nm fs laser pulses. The response time of the measured SiC photodiodes is determined by a decay constant of 7 ns at 0 V BIAS voltage. At a maximum BIAS voltage of -160 V, this converges in an exponential relationship towards 3.5 ns. The rise time could not be measured precisely with the available setup, but is faster than 80 ps (sigma), i.e. approx. 190 ps (FWHM).

What about the saturation of the photodiodes?

Summary:
An S-chip type photodiode saturates at around 4.2 kW/cm². Such a high irradiance is very unusual.
Detailed answer:
The saturation current Isat of a photodiode is determined by its open circuit voltage VOC and its series resistance RS according to the formula: Isat = VOC / RS A typical value (SiC photodiode) for VOC is 2.0 V and for RS = 5 Ohm. This gives Isat = 2.0 V / 5 Ohm = 0.4 A = 400 mA. The saturation radiant intensity z is calculated using the formula below: z = Isat / (S * A) Where S is the sensitivity of a photodiode and A is the active area. A typical value for S is 0.16 A/W and A = 0.06 mm² (valid for SG01S). This gives: zsat = 0.4 A / (0.160 A/W * 6 * 10-8 m²) = approx. 42 MW/m² = 4.2 kW/cm². Such a high irradiance is very unusual. However, some laser measurement applications can reach such irradiance levels for short periods of time. This may affect the output current of the photodiode. Please contact us for further information.

Is the photodiode waterproof?

Summary:
Yes.
Detailed answer:
Yes, the photodiode is hermetically sealed and, accordingly, water pressure proof. However, the rear side contact pins must not get in contact with water our moisture. This will influence the photodiode’s output current.

VOLTCON

accessoire photodiodes UV, convertisseur de mesure, amplificateur de tension, platine, également avec boitier, alimentation et calibrageConvertisseur d’un photocourant en une tension de sortie 0 – 5 VPrix unitaire: 59€Description du produit
- convertisseur d’un photocourant en une tension de sortie 0 – 5 V
- photocourant maximum: 500 µA, 5 µA, 50 nA ou 500 pA
- existe également avec boitier, alimentation et calibrage
AMPCON

accessoire photodiodes UV, convertisseur de mesures, amplificateur de courant, platineConvertisseur (amplificateur de courant) avec courant de sortie 4 - 20 mAPrix unitaire: 59€Description du produit
- convertisseur (amplificateur de courant) avec courant de sortie 4 – 20 mA
- pour l’intégration de photodiodes dans un système de bus de données 4 – 20 mA conventionnel
- photocourant maximum: 250 µA, 2.5 µA ou 25 nA
Multiboard (TW-MF2CAB)

accessoire photodiodes UV, amplificateur de mesures, platine Amplificateur de mesures universel à 2 canauxPrix unitaire: 99€Description du produit
- amplificateur de mesures universel à 2 canaux
- grandes possibilités de configuration
- amplification de courants de 400 nA à 400 µA
Digiboard

accessoire photodiodes UV, amplificateur de mesures, platineAmplificateur universel de courant / tension à 2 canauxPrix unitaire: 149€Description du produit
- amplificateur universel de courant / tension à 2 canaux
- une sortie analogique et une sortie de fréquence
SGCD4

The SGCD4 is a switchable gain photocurrent digitizer that converts small DC currents (e.g. generated by photodiodes) into digital values transmitted via USB to a computer for displaying and recording. Four different current measurement ranges are user selectable by software. The device is delivered with a PTB traceable current calibration.switchable gain photocurrent digitizer, converts small DC currents into digital values, different current measurement rangesPrix unitaire: 520€Description du produit
- switchable gain photocurrent digitizer, converting small DC currents (e.g. generated by photodiodes) into digital values transmitted via USB to a computer for displaying and recording
- four switchable gain levels
- no specific previous metrological knowledge needed
- delivered with a PTB traceable current calibration
- low noise cable available on request
Mounted photodiode

Photodiode dans un boîtier avec connexion BNCPhotodiode dans un boîtier avec connexion BNCPrix unitaire: 130€Description du produit
- Photodiode dans un boîtier M12x1 avec connexion BNC
- convient à toutes les photodiodes UV sglux
- Une plaque de montage pour bancs optiques est disponible en option.
- Une résistance shunt intégrée est disponible en option, valeur de résistance selon les spécifications du client.
RADIKON-simple

boîte d'alimentation, contrôleur des données de mesure, accessoire capteur UV UV-Cure-HTBoîte d’amplification pour la conversion de photocourantPrix unitaire: 155,00€Description du produit
- boîte d’amplification pour la conversion de photocourant des photodiodes et des capteurs sglux UV-Cure-HT
- signal de sortie 0 – 5 V, 4 – 20 mA ou USB
- Le gain est configuré spécifiquement pour le client.
- Le module est également disponible avec calibrage.
- boîtier robuste et blindé avec entrée BNC
SENSOR MONITOR 5.0

Module de contrôle, affichage, mesure et pilotage, accessoire photodiodes UV et sondes de mesure UVModule de mesure et de contrôle pour la surveillance et l’automatisation de procédés d’irradiationPrix unitaire: 490,00€Description du produit
- Module de mesure et de contrôle pour la surveillance et l’automatisation de procédés d’irradiation
- Indication des informations sur le rayonnement, la dose et l’état
- trois relais programmables pour le pilotage d’automatisations de procédés d’irradiation mono- ou multi-niveau
- deux entrées de mesures et sortie USB/RS232 optionnelles
Photodiode Amplifier Dual

accessoire Photodiodes UV, amplificateur de photocourantAmplificateur photocourant à deux canauxPrix unitaire: 420€Description du produit
- amplificateur de photocourant à deux canaux pour la conversion de faibles courants en tension
- conversion du photocourant en un signal de sortie 0 … 5 V
- photocourant maximum: 100 pA … 40 µA
- adapté aux installations expérmimentales dans les laboratoires de mesures
Photodiode Amplifier Connect

accessoire photodiodes UV, amplificateur de photocourantAmplificateur de photocourant avec sortie relais intégréePrix unitaire: 450€Description du produit
- amplificateur de photocourant avec sortie relais intégrée pour la conversion de faibles courants en tension
- conversion du photocourant en un signal de sortie 0 … 5 V
- photocourant maximum: 100 pA … 40 µA
- adapté aux installations expérmimentales dans les laboratoires de mesures