The Rat Vaginal Estrus Cycle Monitor is a device developed primarily to obtain accurate information on the mating cycle of rats and mice during estrus. By measuring the electrical impedance data of the vaginal mucosal epithelial cell layer in rats and mice, the mating cycle of mice can be determined.

The electrical impedance of the vaginal mucosal epithelial cell layer is measured by inserting a probe into the vagina at a frequency of 1 kilohertz (1KHz), and the measurement range of this device is 0-19.9 kohm (kiloohms). The impedance of mice significantly increases during the estrus cycle, and compared to other stages of the estrus cycle, the impedance reaching 3 kiloohms (3kohm) is considered the pre estrus stage.

P is the pre estrus stage

EIV changes (during mouse estrus cycle), EIV shows high values in the pre estrus period and periodic changes during estrus period

The conventional measurement method (vaginal smear method) is quite cumbersome, requires operators to have certain skills, and wastes time and manpower. The rat vaginal impedance detector is a reliable, time-saving and labor-saving device, easy to operate, and easy for beginners to master and use.

model: MK-12

The main functions of the rat pregnancy measuring instrumentcharacteristic：

·A good method for determining the pre estrus stage of mice and rats;

·Powerful tools to improve reproductive efficiency;

·Good repeatability and high measurement efficiency;

·Easy to operate;

·Battery powered, easy to use;

There are two types of probes to choose from, one for rats and one for mice:

Probe model: RP-45A，MP-35A

The main functions of the rat pregnancy measuring instrumentspecifications：

·Control: Panel power button switch

·Data output: LCD screen display

·Power supply: 2AA nickel hydrogen battery, rechargeable

·Battery life: 30 hours

·Probe interface: plug-in type

·Sound level:< 70 dB (A)

·Measurement range: 0-19.9KOhm

·Accuracy: ± 1% ± 1 digit

·Calibration: Automatic

·Measurement frequency: 1KHz

·Weight: 0.2kg

·Size: 10 (w) x14 (d) x3 (h) cm

·Probe size (rat): 55mm x 4.5mm OD

·Probe size (mouse): 50mm x 3.5mm OD