Comparison Bosch GIS 1000 C Professional 0601083300 vs Bosch PTD 1 0603683020

The type of laser designator provided in the design of the pyrometer.

The laser pointer allows you to see exactly where the device is directed and the temperature of which particular area it measures. The options could be:

— Single point. Target designator in the form of a single beam pointing to the centre of the measurement area. The simplest and cheapest option, however, not very accurate — in the sense that the user cannot accurately assess which area on the measured surface falls into the field of view of the pyrometer.

— Two-point. Target designator in the form of two beams pointing to points along the edges of the measurement area. The location of the points can be horizontal (left and right) or vertical (top and bottom). Anyway, such a target designator already allows you to determine the size of the area that falls into the field of view of the device. However, it costs a little more than a single-point one, and therefore is less common.

— Multi-point circular. Target designator in the form of several rays forming a circle of dots on the measured surface. This is the most complex and expensive, but also the most accurate option: the circle clearly shows the location and size of the measurement area.

— Missing. The complete absence of any tar...get designator in the design; it is necessary to direct such a device "by eye". This option is found exclusively in individual models of the most compact devices, which, in principle, are not designed for measurements at long distances.

The range of surface temperatures that the instrument can effectively measure.

In general, the meaning of this parameter is quite obvious. We only note that an extensive operating range is not always an advantage. First, it affects the cost of the device; secondly, when the range is extended, the measurement accuracy may deteriorate. So when choosing, you should not chase the maximum temperature range, but take into account real needs: for example, it hardly makes sense to choose a pyrometer with an upper limit of 500 °C for measuring the quality of thermal insulation and determining heat leaks in residential premises. It is conditionally possible to divide pyrometers into those that are for measuring low temperatures, and, accordingly, for high ones.

The range of relative humidity that the instrument can effectively measure. Humidity measurement is an additional function that allows you to more accurately assess the surrounding conditions, for example, the microclimate in a particular room.

The range of ambient (ambient) temperatures that the instrument can effectively measure.

The ability to measure air temperature, provided in some models, allows the pyrometer to be used as a traditional indoor or outdoor thermometer. This function can be useful, in particular, when looking for problems with the thermal insulation of a room.

Instrument sighting index.

The sighting indicator is the ratio between the distance to the surface, the temperature of which is measured, and the diameter of the spot that enters the field of view of the device. For example, if at a distance of 2 m the device will cover a zone of 10 cm (0.1 m), then the sighting index will be 2 / 0.1 = 20.

When choosing for this parameter, it is worth considering the expected measurement conditions — the dimensions of the objects whose temperature is supposed to be measured, and the distances to them. At the same time, it is worth remembering that for accurate measurement, the measured surface must completely occupy the field of view of the pyrometer — otherwise the device will also “see” foreign objects, the radiation of which will distort the measurement results. Therefore, for long distances, models with high sighting rates are recommended — 40, 50, etc. If measurements are planned to be carried out at a distance of one or two metres, and the measured objects are quite large, you should pay attention to models with relatively small values of this parameter — 10 , 20 etc.

Approximate response time of the device, namely the time that elapses from pressing the measurement button until the results are shown on the display (or from a change in temperature to a change in the readings on the display, if we are talking about continuous measurement mode). In most cases, this parameter does not play a special role: even in the "slowest" devices, it does not exceed 1000 ms (1 s), which does not lead to any inconvenience. It is worth paying attention to the response time only if the device is planned to be used to measure the temperature of fast moving objects: the faster the reaction, the less time you have to keep the measured object in the field of view of the pyrometer, the lower the likelihood that this object can “jump out” from the field of view until the end of measurements.

The range of ambient air temperatures over which the instrument can perform its functions normally.

All modern pyrometers are guaranteed to work at room temperature. At the same time, they usually allow deviations from it within 15 – 20 °C — for example, in many models, the operating temperature range is claimed within 0 ... 40 °C. So you should pay attention to this indicator if the device is planned to be used at temperatures below zero, or vice versa, in hot conditions — not every model is able to work normally with one or another “extreme”.

Note that going beyond the range of permissible temperatures does not necessarily lead to a breakdown of the device. However, one should not deviate from these recommendations, at least in the light of the fact that under abnormal conditions the device begins to give too high an error, and there is no need to talk about any measurement accuracy.

— Adjustment of emissivity. The ability to adjust the device to the emissivity of different materials. The emissivity determines how much energy a given surface radiates at a certain temperature; it is expressed by numbers from 0 to 1 (coefficient 1 has an perfect “absolutely black body”). Without going into too much physical detail, we can say that if the instrument settings do not correspond to the actual emissivity of the surface being measured, the measurement results will also differ from the actual temperature. However, most of the surfaces that one has to deal with in fact — wood, brickwork, plastic, coated with paint and metal oxides — have an emissivity of 0.8 – 0.9; pyrometers are set to these indicators by default, and additional correction during measurements is generally not required. But the radiation index of polished metal and some other materials can be noticeably lower than these values, and the pyrometer must be adjusted separately for such surfaces. Well, anyway, if the maximum accuracy of measurements is critical for you, you should choose a device with adjustable emissivity and adjust it for each individual surface. There are special tables that allow you to determine this coefficient for different types of materials.

— Backlight. The presence in the device of its own backlight. In this case, both conventional and ultraviolet illumination can be implied. T...he first actually complements the pyrometer with a flashlight function and makes it easier to work in low light conditions. UV illumination, on the other hand, is primarily designed to detect refrigerant leaks in air conditioners and refrigeration units: many refrigerants contain an additive that glows in UV rays. The specific type of backlight for each model should be specified separately.

— USB port. Standard USB connector for connecting the device to a computer, laptop, etc. Usually, to use the possibilities of such a connection, you need to install special software from the manufacturer's website. Connectivity may vary. So, the recording function is often encountered when the computer constantly monitors the readings of the device, building a chart or table of temperature fluctuations. Other devices may provide the ability to copy measurements from their own memory to a PC. The USB port can also be used to charge the battery (see "Power") and configure the pyrometer — for example, adjusting the emissivity (see above), calibrating, updating the firmware, etc. The specific set of capabilities in each case should be clarified separately.

— RS-232. Also known as a COM port. Service connector for connecting the pyrometer to computers and some types of specialized equipment. Data can be transmitted via RS-232 in two directions: an external device can record pyrometer readings and, if necessary, control instrument settings from it.

— Bluetooth. Bluetooth wireless technology is used for direct connection between different devices. Theoretically, the ways of using such a compound can be different; Specifically, in this case, Bluetooth is mainly used to connect the pyrometer to a smartphone, tablet or gadget and transfer measurement results to this gadget. To process the results, usually, you need to install a special application; it provides a variety of additional capabilities and is often more convenient than manual processing of results, especially when dealing with large amounts of data.

— PP3. A standard 9-volt battery of the PP3 type is rectangular in shape, with a pair of contacts on one of the ends. Quite a popular option: for a number of reasons, a voltage of 9 V is very convenient for use in pyrometers.

— AA. A popular standard size of replaceable cells, known as "finger-type batteries". Similar cells are also available in the form of rechargeable batteries. In pyrometers, such power is less common than PP3 — in particular, because several AA batteries are usually required for efficient operation. However, it is also quite a popular option.

— AAA. Another common size of replaceable elements is “little batteries”. Similar to the AAs described above in every way, except for a smaller size and, accordingly, a lower capacity. They are mainly used in compact devices for which even "finger-type" batteries are too bulky.

— Proprietary battery. Powered by its own battery of the original standard, which can also be made non-removable. On the one hand, such power supply has a number of advantages over replaceable batteries. So, the battery is initially supplied in the kit, it does not need to be purchased separately; and when the charge is exhausted, you do not need to spend money on fresh batteries — just put the device on charge. On the other hand, chargi...ng requires a power source and takes quite a long time, while batteries, with spares, can be changed in a matter of seconds. Therefore, this option has not received much distribution.

— CR2032. Sufficiently miniature “coin” batteries with a diameter of 32 mm and a thickness of 2 mm. Due to the low capacity, they are used extremely rarely — only in miniature devices designed for maximum compactness and, usually, intended for short distances (up to 1 m).

There are also models with a combined power supply that can operate from various sources.

— PP3 / external power supply. Models capable of operating both from the PP3 battery described above and from the AC adapter supplied in the kit. The advantage of this option is that if there is an outlet, the device can be connected to it, saving battery power (or even charging it if a battery in the PP3 form factor is used for power).

— AA / proprietary battery. Devices that can operate both from replaceable AA batteries and from a branded battery. To do this, the package usually includes an adapter that allows you to install a set of batteries instead of the battery. Note that the battery itself is not necessarily supplied with the pyrometer — on the contrary, batteries may be included in the package, the battery must be purchased separately (or removed from another tool of the same brand — some manufacturers use universal interchangeable batteries for their devices). See above for more details on each type of power supply, and their combination gives the user a choice and, theoretically, allows you to mutually compensate for shortcomings. On the other hand, in most cases it is easier to buy replacement cells in the form of batteries than to mess around with a branded battery, so this option has not received much distribution.